{"id":23510,"date":"2021-12-17T17:03:20","date_gmt":"2021-12-17T10:03:20","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=23510"},"modified":"2021-12-17T17:03:24","modified_gmt":"2021-12-17T10:03:24","slug":"tiep-tuyen-cua-ham-so","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tiep-tuyen-cua-ham-so\/","title":{"rendered":"TI\u1ebeP TUY\u1ebeN C\u1ee6A H\u00c0M S\u1ed0"},"content":{"rendered":"\n<p><\/p>\n\n\n<p><a id=\"post-23510-_Toc492701526\"><\/a><a id=\"post-23510-_Toc493273876\"><\/a><strong>A. CHU\u1ea8N KI\u1ebeN TH\u1ee8C<\/strong><\/p>\n<p>\u00b7 <em>\u00dd ngh\u0129a h\u00ecnh h\u1ecdc c\u1ee7a \u0111\u1ea1o h\u00e0m<\/em>: \u0110\u1ea1o h\u00e0m c\u1ee7a h\u00e0m s\u1ed1 <img decoding=\"async\" width=\"62\" height=\"25\" class=\"wp-image-23511\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_256-39.png\" alt=\"IMG_256\" \/> t\u1ea1i \u0111i\u1ec3m <img decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23512\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_257-38.png\" alt=\"IMG_257\" \/> l\u00e0 h\u1ec7 s\u1ed1 g\u00f3c<\/p>\n<p>c\u1ee7a ti\u1ebfp tuy\u1ebfn v\u1edbi \u0111\u1ed3 th\u1ecb (C) c\u1ee7a h\u00e0m s\u1ed1 t\u1ea1i \u0111i\u1ec3m <img decoding=\"async\" width=\"109\" height=\"32\" class=\"wp-image-23513\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_258-39.png\" alt=\"IMG_258\" \/> .<\/p>\n<p>Khi \u0111\u00f3 ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a (C) t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"109\" height=\"32\" class=\"wp-image-23514\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_259-37.png\" alt=\"IMG_259\" \/> l\u00e0:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"177\" height=\"29\" class=\"wp-image-23515\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_260-39.png\" alt=\"IMG_260\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"32\" class=\"wp-image-23516\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_261-36.png\" alt=\"IMG_261\" \/><\/p>\n<p>\u00b7 \u0110i\u1ec1u ki\u1ec7n c\u1ea7n v\u00e0 \u0111\u1ee7 \u0111\u1ec3 hai \u0111\u01b0\u1eddng <img loading=\"lazy\" decoding=\"async\" width=\"107\" height=\"32\" class=\"wp-image-23517\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_262-37.png\" alt=\"IMG_262\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"32\" class=\"wp-image-23518\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_263-38.png\" alt=\"IMG_263\" \/> ti\u1ebfp x\u00fac nhau<\/p>\n<p>t\u1ea1i \u0111i\u1ec3m c\u00f3 ho\u00e0nh \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23519\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_264-37.png\" alt=\"IMG_264\" \/> l\u00e0 h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"59\" class=\"wp-image-23520\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_265-37.png\" alt=\"IMG_265\" \/> c\u00f3 nghi\u1ec7m <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23521\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_266-37.png\" alt=\"IMG_266\" \/><\/p>\n<p>Nghi\u1ec7m c\u1ee7a h\u1ec7 l\u00e0 ho\u00e0nh \u0111\u1ed9 c\u1ee7a ti\u1ebfp \u0111i\u1ec3m c\u1ee7a hai \u0111\u01b0\u1eddng \u0111\u00f3.<\/p>\n<p>\u00b7 N\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"29\" class=\"wp-image-23522\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_267-38.png\" alt=\"IMG_267\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"169\" height=\"35\" class=\"wp-image-23523\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_268-38.png\" alt=\"IMG_268\" \/> th\u00ec<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"29\" class=\"wp-image-23524\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_269-38.png\" alt=\"IMG_269\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"32\" class=\"wp-image-23525\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_270-36.png\" alt=\"IMG_270\" \/> i\u1ebfp x\u00fac nhau \u00db ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"159\" height=\"32\" class=\"wp-image-23526\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_271-38.png\" alt=\"IMG_271\" \/> c\u00f3 nghi\u1ec7m k\u00e9p.<\/p>\n<p><strong><em>C\u00e1c d\u1ea1ng ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 th\u01b0\u1eddng g\u1eb7p<\/em><\/strong><\/p>\n<p>&#8211; Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn khi bi\u1ebft t\u1ecda \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23527\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_272-38.png\" alt=\"IMG_272\" \/> , ho\u1eb7c ho\u00e0nh \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23528\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_273-36.png\" alt=\"IMG_273\" \/> , ho\u1eb7c tung \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23529\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_274-37.png\" alt=\"IMG_274\" \/> .<\/p>\n<p>&#8211; Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn khi bi\u1ebft ti\u1ebfp tuy\u1ebfn \u0111i qua \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"32\" class=\"wp-image-23530\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_275-36.png\" alt=\"IMG_275\" \/> cho tr\u01b0\u1edbc.<\/p>\n<p>&#8211; Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn khi bi\u1ebft h\u1ec7 s\u1ed1 g\u00f3c c\u1ee7a n\u00f3.<\/p>\n<p><strong> Ph\u01b0\u01a1ng ph\u00e1p: <\/strong><\/p>\n<p>Cho h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23531\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_276-37.png\" alt=\"IMG_276\" \/> c\u00f3 \u0111\u1ed3 th\u1ecb <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"32\" class=\"wp-image-23532\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_277-37.png\" alt=\"IMG_277\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23533\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_278-38.png\" alt=\"IMG_278\" \/> l\u00e0 \u0111i\u1ec3m tr\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"32\" class=\"wp-image-23534\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_279-36.png\" alt=\"IMG_279\" \/> . Ti\u1ebfp tuy\u1ebfn v\u1edbi \u0111\u1ed3 th\u1ecb <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"32\" class=\"wp-image-23535\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_280-38.png\" alt=\"IMG_280\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23536\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_281-37.png\" alt=\"IMG_281\" \/> c\u00f3:<\/p>\n<p>&#8211; H\u1ec7 s\u1ed1 g\u00f3c: <img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"32\" class=\"wp-image-23537\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_282-38.png\" alt=\"IMG_282\" \/><\/p>\n<p>&#8211; Ph\u01b0\u01a1ng tr\u00ecnh: <img loading=\"lazy\" decoding=\"async\" width=\"140\" height=\"32\" class=\"wp-image-23538\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_283-37.png\" alt=\"IMG_283\" \/> , hay <img loading=\"lazy\" decoding=\"async\" width=\"175\" height=\"32\" class=\"wp-image-23539\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_284-37.png\" alt=\"IMG_284\" \/><\/p>\n<p>V\u1eady, \u0111\u1ec3 vi\u1ebft \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23540\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_285-38.png\" alt=\"IMG_285\" \/> ch\u00fang ta c\u1ea7n \u0111\u1ee7 ba y\u1ebfu t\u1ed1 sau:<\/p>\n<p>&#8211; Ho\u00e0nh \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m: <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23541\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_286-37.png\" alt=\"IMG_286\" \/><\/p>\n<p>&#8211; Tung \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m: <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23542\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_287-38.png\" alt=\"IMG_287\" \/> (N\u1ebfu \u0111\u1ec1 ch\u01b0a cho, ta ph\u1ea3i t\u00ednh b\u1eb1ng c\u00e1ch thay <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23543\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_288-38.png\" alt=\"IMG_288\" \/> v\u00e0o h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23544\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_289-39.png\" alt=\"IMG_289\" \/> )<\/p>\n<p>&#8211; H\u1ec7 s\u1ed1 g\u00f3c <img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"32\" class=\"wp-image-23545\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_290-38.png\" alt=\"IMG_290\" \/><\/p>\n<p><strong>B. LUY\u1ec6N K\u0128 N\u0102NG GI\u1ea2I C\u00c1C D\u1ea0NG B\u00c0I T\u1eacP.<\/strong><\/p>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p .<\/strong><\/p>\n<p><strong>1. Hai \u0111\u1ed3 th\u1ecb ti\u1ebfp x\u00fac<\/strong><\/p>\n<p><strong>1.1. \u0110\u1ecbnh ngh\u0129a<\/strong>: Hai \u0111\u1ed3 th\u1ecb c\u1ee7a hai h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23546\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_292-38.png\" alt=\"IMG_292\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"70\" height=\"32\" class=\"wp-image-23547\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_293-38.png\" alt=\"IMG_293\" \/> g\u1ecdi l\u00e0 ti\u1ebfp x\u00fac nhau t\u1ea1i \u0111i\u1ec3m M n\u1ebfu t\u1ea1i M ch\u00fang c\u00f3 c\u00f9ng ti\u1ebfp tuy\u1ebfn.<\/p>\n<p><strong>2.1. \u0110\u1ecbnh l\u00ed 1<\/strong>: Hai \u0111\u1ed3 th\u1ecb c\u1ee7a hai h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23548\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_294-37.png\" alt=\"IMG_294\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"70\" height=\"32\" class=\"wp-image-23549\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_295-36.png\" alt=\"IMG_295\" \/> ti\u1ebfp x\u00fac nhau khi v\u00e0 ch\u1ec9 khi h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh: <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"59\" class=\"wp-image-23550\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_296-36.png\" alt=\"IMG_296\" \/> c\u00f3 nghi\u1ec7m v\u00e0 nghi\u1ec7m c\u1ee7a h\u1ec7 l\u00e0 t\u1ecda \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m.<\/p>\n<p><strong>2. Ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1<\/strong><\/p>\n<p><strong>1.2. \u0110\u1ecbnh ngh\u0129a:<\/strong> Cho h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23551\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_297-36.png\" alt=\"IMG_297\" \/> . M\u1ed9t c\u00e1t tuy\u1ebfn <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"29\" class=\"wp-image-23552\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_298-36.png\" alt=\"IMG_298\" \/> \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n b\u1edfi \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"29\" class=\"wp-image-23553\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_299-37.png\" alt=\"IMG_299\" \/> khi <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-23554\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_300-37.png\" alt=\"IMG_300\" \/> d\u1ea7n t\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"29\" class=\"wp-image-23555\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_301-37.png\" alt=\"IMG_301\" \/> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"29\" class=\"wp-image-23556\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_302-37.png\" alt=\"IMG_302\" \/> g\u1ecdi l\u00e0 ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb. <img loading=\"lazy\" decoding=\"async\" width=\"30\" height=\"29\" class=\"wp-image-23557\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_303-37.png\" alt=\"IMG_303\" \/> g\u1ecdi l\u00e0 ti\u1ebfp \u0111i\u1ec3m.<\/p>\n<p><strong>\u0110\u1ecbnh l\u00ed 2<\/strong>: \u0110\u1ea1o h\u00e0m c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"32\" class=\"wp-image-23558\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_304-37.png\" alt=\"IMG_304\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"29\" class=\"wp-image-23559\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_305-37.png\" alt=\"IMG_305\" \/> l\u00e0 h\u1ec7 s\u1ed1 g\u00f3c c\u1ee7a ti\u1ebfp tuy\u1ebfn t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"35\" class=\"wp-image-23560\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_306-37.png\" alt=\"IMG_306\" \/> .<\/p>\n<p><strong>Nh\u1eadn x\u00e9t<\/strong>: H\u1ec7 s\u1ed1 g\u00f3c c\u1ee7a m\u1ecdi ti\u1ebfp tuy\u1ebfn \u0111\u1ec1u c\u00f3 d\u1ea1ng <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"32\" class=\"wp-image-23561\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_307-37.png\" alt=\"IMG_307\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_307-37.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_307-37-50x32.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> .<\/p>\n<p><strong>2.2. C\u00e1c b\u00e0i to\u00e1n v\u1ec1 ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn:<\/strong><\/p>\n<p><strong>B\u00e0i to\u00e1n 1:<\/strong> Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23562\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_308-37.png\" alt=\"IMG_308\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"29\" class=\"wp-image-23563\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_309-36.png\" alt=\"IMG_309\" \/> .<\/p>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p:<\/strong><\/p>\n<p>Ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"62\" height=\"25\" class=\"wp-image-23564\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_310-37.png\" alt=\"IMG_310\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"80\" height=\"29\" class=\"wp-image-23565\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_311-36.png\" alt=\"IMG_311\" \/> l\u00e0:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"167\" height=\"29\" class=\"wp-image-23566\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_312-36.png\" alt=\"IMG_312\" \/> v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"80\" height=\"29\" class=\"wp-image-23567\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_313-35.png\" alt=\"IMG_313\" \/> .<\/p>\n<p><strong>B\u00e0i to\u00e1n 2<\/strong>: Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"62\" height=\"25\" class=\"wp-image-23568\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_314-35.png\" alt=\"IMG_314\" \/> , bi\u1ebft ti\u1ebfp tuy\u1ebfn c\u00f3 h\u1ec7 s\u1ed1 g\u00f3c <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-23569\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_315-35.png\" alt=\"IMG_315\" \/> .<\/p>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p<\/strong>:<\/p>\n<p><strong>C\u00e1ch 1<\/strong>:<\/p>\n<p>*Ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u00f3 d\u1ea1ng: <img loading=\"lazy\" decoding=\"async\" width=\"80\" height=\"25\" class=\"wp-image-23570\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_316-35.png\" alt=\"IMG_316\" \/><\/p>\n<p>* \u0110i\u1ec1u ki\u1ec7n ti\u1ebfp x\u00fac l\u00e0 h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh: <img loading=\"lazy\" decoding=\"async\" width=\"140\" height=\"59\" class=\"wp-image-23571\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_317-35.png\" alt=\"IMG_317\" \/><\/p>\n<p>T\u1eeb (2) ta t\u00ecm \u0111\u01b0\u1ee3c <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"15\" class=\"wp-image-23572\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_318-35.png\" alt=\"IMG_318\" \/> , th\u1ebf v\u00e0o (1) ta c\u00f3 \u0111\u01b0\u1ee3c <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-23573\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_319-35.png\" alt=\"IMG_319\" \/> . Ta c\u00f3 ti\u1ebfp tuy\u1ebfn c\u1ea7n t\u00ecm.<\/p>\n<p><strong>C\u00e1ch 2<\/strong>:<\/p>\n<p>* Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"67\" height=\"25\" class=\"wp-image-23574\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_320-35.png\" alt=\"IMG_320\" \/> gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y ta t\u00ecm \u0111\u01b0\u1ee3c c\u00e1c nghi\u1ec7m <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"29\" class=\"wp-image-23575\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_321-34.png\" alt=\"IMG_321\" \/> .<\/p>\n<p>* Ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn: <img loading=\"lazy\" decoding=\"async\" width=\"282\" height=\"29\" class=\"wp-image-23576\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_322-34.png\" alt=\"IMG_322\" \/> .<\/p>\n<p><strong>Chu\u0301 y\u0301:<\/strong> \u0110\u00f4\u0301i v\u01a1\u0301i ba\u0300i toa\u0301n na\u0300y ta c\u1ea7n l\u01b0u y\u0301 m\u00f4\u0323t s\u00f4\u0301 v\u00e2\u0301n \u0111\u00ea\u0300 sau:<\/p>\n<p>* S\u00f4\u0301 ti\u00ea\u0301p tuy\u00ea\u0301n cu\u0309a \u0111\u00f4\u0300 thi\u0323 chi\u0301nh la\u0300 s\u00f4\u0301 nghi\u00ea\u0323m cu\u0309a ph\u01b0\u01a1ng tri\u0300nh : <img loading=\"lazy\" decoding=\"async\" width=\"67\" height=\"25\" class=\"wp-image-23577\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_323-32.png\" alt=\"IMG_323\" \/> .<\/p>\n<p>*Cho hai \u0111\u01b0\u01a1\u0300ng th\u0103\u0309ng <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"29\" class=\"wp-image-23578\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_324-32.png\" alt=\"IMG_324\" \/> va\u0300 <img loading=\"lazy\" decoding=\"async\" width=\"127\" height=\"29\" class=\"wp-image-23579\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_325-32.png\" alt=\"IMG_325\" \/> . Khi \u0111o\u0301<\/p>\n<p>i) <img loading=\"lazy\" decoding=\"async\" width=\"135\" height=\"59\" class=\"wp-image-23580\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_326-32.png\" alt=\"IMG_326\" \/> , trong \u0111o\u0301 <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"34\" class=\"wp-image-23581\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_327-32.png\" alt=\"IMG_327\" \/> .<\/p>\n<p>ii) <img loading=\"lazy\" decoding=\"async\" width=\"155\" height=\"59\" class=\"wp-image-23582\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_328-31.png\" alt=\"IMG_328\" \/><\/p>\n<p>iii) <img loading=\"lazy\" decoding=\"async\" width=\"167\" height=\"29\" class=\"wp-image-23583\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_329-31.png\" alt=\"IMG_329\" \/> .<\/p>\n<p><strong>B\u00e0i to\u00e1n 01: . Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn khi bi\u1ebft t\u1ecda \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m<\/strong><\/p>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p .<\/strong><\/p>\n<p><strong><em>B\u00e0i to\u00e1n 1 :<\/em><\/strong><\/p>\n<p>Hai \u0111\u01b0\u1eddng cong <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"32\" class=\"wp-image-23584\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_330-31.png\" alt=\"IMG_330\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"110\" height=\"32\" class=\"wp-image-23585\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_331-31.png\" alt=\"IMG_331\" \/> ti\u1ebfp x\u00fac nhau t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23586\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_332-31.png\" alt=\"IMG_332\" \/> .Khi \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"32\" class=\"wp-image-23587\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_333-31.png\" alt=\"IMG_333\" \/> v\u00e0 ti\u1ebfp tuy\u1ebfn t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-23588\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_334-30.png\" alt=\"IMG_334\" \/> c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"32\" class=\"wp-image-23589\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_335-30.png\" alt=\"IMG_335\" \/> tr\u00f9ng v\u1edbi ti\u1ebfp tuy\u1ebfn t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"22\" class=\"wp-image-23590\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_336-30.png\" alt=\"IMG_336\" \/> c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"37\" height=\"32\" class=\"wp-image-23591\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_337-30.png\" alt=\"IMG_337\" \/> ch\u1ec9 khi h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh sau: <img loading=\"lazy\" decoding=\"async\" width=\"137\" height=\"65\" class=\"wp-image-23592\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_338-30.png\" alt=\"IMG_338\" \/> c\u00f3 nghi\u1ec7m <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23593\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_339-29.png\" alt=\"IMG_339\" \/> .<\/p>\n<p><strong>L\u01b0u \u00fd<\/strong> : M\u1ec7nh \u0111\u1ec1 sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang cho m\u1ecdi tr\u01b0\u1eddng h\u1ee3p:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"65\" class=\"wp-image-23594\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_340-29.png\" alt=\"IMG_340\" \/> ti\u1ebfp x\u00fac nhau <img loading=\"lazy\" decoding=\"async\" width=\"145\" height=\"32\" class=\"wp-image-23595\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_341-29.png\" alt=\"IMG_341\" \/> c\u00f3 nghi\u1ec7m k\u00e9p .<\/p>\n<p>H\u00e0m <img loading=\"lazy\" decoding=\"async\" width=\"39\" height=\"32\" class=\"wp-image-23596\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_342-29.png\" alt=\"IMG_342\" \/> nh\u1eadn <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23597\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_343-28.png\" alt=\"IMG_343\" \/> l\u00e0m nghi\u1ec7m b\u1ed9i <img loading=\"lazy\" decoding=\"async\" width=\"17\" height=\"22\" class=\"wp-image-23598\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_344-28.png\" alt=\"IMG_344\" \/> n\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"257\" height=\"39\" class=\"wp-image-23599\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_345-28.png\" alt=\"IMG_345\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"35\" class=\"wp-image-23600\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_346-27.png\" alt=\"IMG_346\" \/> . Nghi\u1ec7m b\u1ed9i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"20\" class=\"wp-image-23601\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_347-26.png\" alt=\"IMG_347\" \/> ch\u1ee9 <strong>kh\u00f4ng ph\u1ea3i nghi\u1ec7m k\u00e9p<\/strong>.<\/p>\n<p>Ph\u00e9p bi\u1ebfn \u0111\u1ed5i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh n\u00f3i chung kh\u00f4ng b\u1ea3o to\u00e0n s\u1ed1 b\u1ed9i c\u1ee7a nghi\u1ec7m.<\/p>\n<p><strong>V\u00ed d\u1ee5 1<\/strong>. \u0110\u01b0\u1eddng cong <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"32\" class=\"wp-image-23602\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_348-25.png\" alt=\"IMG_348\" \/> kh\u00f4ng ti\u1ebfp x\u00fac v\u1edbi tr\u1ee5c ho\u00e0nh t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"22\" class=\"wp-image-23603\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_349-25.png\" alt=\"IMG_349\" \/> , t\u1ee9c l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"29\" class=\"wp-image-23604\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_350-25.png\" alt=\"IMG_350\" \/> kh\u00f4ng nh\u1eadn <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"22\" class=\"wp-image-23605\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_351-25.png\" alt=\"IMG_351\" \/> l\u00e0m nghi\u1ec7m b\u1ed9i l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"20\" class=\"wp-image-23606\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_352-25.png\" alt=\"IMG_352\" \/> . Khi \u0111\u00f3 \u0111\u1ed3 th\u1ecb <img loading=\"lazy\" decoding=\"async\" width=\"87\" height=\"35\" class=\"wp-image-23607\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_353-25.png\" alt=\"IMG_353\" \/> c\u1ee7a h\u00e0m s\u1ed1 ti\u1ebfp x\u00fac v\u1edbi tr\u1ee5c ho\u00e0nh t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"22\" class=\"wp-image-23608\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_354-25.png\" alt=\"IMG_354\" \/> nh\u01b0ng ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"29\" class=\"wp-image-23609\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_355-25.png\" alt=\"IMG_355\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_355-25.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_355-25-50x29.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> nh\u1eadn <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"22\" class=\"wp-image-23610\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_356-25.png\" alt=\"IMG_356\" \/> l\u00e0m nghi\u1ec7m b\u1ed9i <img loading=\"lazy\" decoding=\"async\" width=\"15\" height=\"22\" class=\"wp-image-23611\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_357-25.png\" alt=\"IMG_357\" \/> .<\/p>\n<p><strong>V\u00ed d\u1ee5 2<\/strong>. \u0110\u1ed3 th\u1ecb <img loading=\"lazy\" decoding=\"async\" width=\"105\" height=\"32\" class=\"wp-image-23612\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_358-25.png\" alt=\"IMG_358\" \/> c\u1ee7a h\u00e0m s\u1ed1 ti\u1ebfp x\u00fac v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng <img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"32\" class=\"wp-image-23613\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_359-24.png\" alt=\"IMG_359\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"22\" class=\"wp-image-23614\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_360-23.png\" alt=\"IMG_360\" \/> nh\u01b0ng ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"94\" height=\"22\" class=\"wp-image-23615\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_361-22.png\" alt=\"IMG_361\" \/> th\u00ec kh\u00f4ng th\u1ec3 c\u00f3 nghi\u1ec7m k\u00e9p.<\/p>\n<p>Nh\u01b0 v\u1eady, bi\u1ebfn \u0111\u1ed5i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh ch\u1ec9 b\u1ea3o to\u00e0n t\u1eadp nghi\u1ec7m, ch\u1ee9 kh\u00f4ng ch\u1eafc b\u1ea3o to\u00e0n s\u1ed1 b\u1ed9i c\u00e1c nghi\u1ec7m. \u0110\u00e2y c\u0169ng l\u00e0 sai l\u1ea7m d\u1ec5 m\u1eafc ph\u1ea3i khi gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n ti\u1ebfp tuy\u1ebfn.<\/p>\n<p><strong><em>B\u00e0i to\u00e1n 2 :<\/em><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"20\" class=\"wp-image-23616\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_362-22.png\" alt=\"IMG_362\" \/> \u0110\u01b0\u1eddng cong <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"32\" class=\"wp-image-23617\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_363-19.png\" alt=\"IMG_363\" \/> c\u00f3 ti\u1ebfp tuy\u1ebfn t\u1ea1i \u0111i\u1ec3m c\u00f3 ho\u00e0nh \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23618\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_364-21.png\" alt=\"IMG_364\" \/> khi v\u00e0 ch\u1ec9 khi h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23619\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_365-21.png\" alt=\"IMG_365\" \/> kh\u1ea3 vi t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23620\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_366-21.png\" alt=\"IMG_366\" \/> . Trong tr\u01b0\u1eddng h\u1ee3p <img loading=\"lazy\" decoding=\"async\" width=\"32\" height=\"32\" class=\"wp-image-23621\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_367-21.png\" alt=\"IMG_367\" \/> c\u00f3 ti\u1ebfp tuy\u1ebfn t\u1ea1i \u0111i\u1ec3m c\u00f3 ho\u00e0nh \u0111\u1ed9 <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23622\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_368-20.png\" alt=\"IMG_368\" \/> th\u00ec ti\u1ebfp tuy\u1ebfn \u0111\u00f3 c\u00f3 h\u1ec7 s\u1ed1 g\u00f3c <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"32\" class=\"wp-image-23623\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_369-20.png\" alt=\"IMG_369\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_369-20.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_369-20-50x32.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> .<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"20\" class=\"wp-image-23624\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_370-20.png\" alt=\"IMG_370\" \/> Ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"32\" class=\"wp-image-23625\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_371-20.png\" alt=\"IMG_371\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"35\" class=\"wp-image-23626\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_372-20.png\" alt=\"IMG_372\" \/> c\u00f3 d\u1ea1ng : <img loading=\"lazy\" decoding=\"async\" width=\"195\" height=\"32\" class=\"wp-image-23627\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_373-19.png\" alt=\"IMG_373\" \/><\/p>\n<p><strong>C\u00e1c v\u00ed d\u1ee5 <\/strong><\/p>\n<p><strong>V\u00ed d\u1ee5 1 : <\/strong>Cho h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"120\" height=\"32\" class=\"wp-image-23628\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_374-18.png\" alt=\"IMG_374\" \/> c\u00f3 \u0111\u1ed3 th\u1ecb l\u00e0 (C). Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a (C) :<\/p>\n<p><strong>1. <\/strong>T\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"72\" height=\"32\" class=\"wp-image-23629\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_375-18.png\" alt=\"IMG_375\" \/> ; <strong>2. <\/strong>T\u1ea1i \u0111i\u1ec3m c\u00f3 ho\u00e0nh \u0111\u1ed9 b\u1eb1ng 2 ;<\/p>\n<p><strong>3. <\/strong>T\u1ea1i \u0111i\u1ec3m c\u00f3 tung \u0111\u1ed9 b\u1eb1ng 1 ;. <strong>4. <\/strong>T\u1ea1i giao \u0111i\u1ec3m (C) v\u1edbi tr\u1ee5c tung ;<\/p>\n<p><strong>5. <\/strong>C\u00f3 h\u1ec7 s\u1ed1 g\u00f3c l\u00e0 9 ;<\/p>\n<p><strong>6. <\/strong>Song song v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng (d ): <img loading=\"lazy\" decoding=\"async\" width=\"122\" height=\"25\" class=\"wp-image-23630\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_376-17.png\" alt=\"IMG_376\" \/> ;<\/p>\n<p><strong>7. <\/strong>Vu\u00f4ng g\u00f3c v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng (d\u2019 ) : <img loading=\"lazy\" decoding=\"async\" width=\"130\" height=\"25\" class=\"wp-image-23631\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_377-16.png\" alt=\"IMG_377\" \/> .<\/p>\n<p><strong>L\u1eddi gi\u1ea3i.<\/strong><\/p>\n<p>H\u00e0m s\u1ed1 \u0111\u00e3 cho x\u00e1c \u0111\u1ecbnh <img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"20\" class=\"wp-image-23632\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_378-15.png\" alt=\"IMG_378\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_378-15.png 54w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_378-15-50x20.png 50w\" sizes=\"(max-width: 54px) 100vw, 54px\" \/><\/p>\n<p>Ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"32\" class=\"wp-image-23633\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_379-15.png\" alt=\"IMG_379\" \/><\/p>\n<p><strong>1. <\/strong>Ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23634\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_380-15.png\" alt=\"IMG_380\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"72\" height=\"32\" class=\"wp-image-23635\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_381-15.png\" alt=\"IMG_381\" \/> c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh : <img loading=\"lazy\" decoding=\"async\" width=\"157\" height=\"32\" class=\"wp-image-23636\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_382-15.png\" alt=\"IMG_382\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_382-15.png 157w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_382-15-150x32.png 150w\" sizes=\"(max-width: 157px) 100vw, 157px\" \/><\/p>\n<p>Ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"32\" class=\"wp-image-23637\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_383-15.png\" alt=\"IMG_383\" \/> , khi \u0111\u00f3 ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23638\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_384-15.png\" alt=\"IMG_384\" \/> l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"25\" class=\"wp-image-23639\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_385-15.png\" alt=\"IMG_385\" \/><\/p>\n<p><strong><em>Ch\u00fa \u00fd: <\/em><\/strong><\/p>\n<p>Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23640\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_386-15.png\" alt=\"IMG_386\" \/> t\u1ea1i \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"104\" height=\"35\" class=\"wp-image-23641\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_387-13.png\" alt=\"IMG_387\" \/> .<\/p>\n<p>Ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23642\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_388-11.png\" alt=\"IMG_388\" \/> t\u1ea1i <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23643\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_389-9.png\" alt=\"IMG_389\" \/> l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"174\" height=\"32\" class=\"wp-image-23644\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_390-10.png\" alt=\"IMG_390\" \/><\/p>\n<p><strong>2. <\/strong>Thay <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"20\" class=\"wp-image-23645\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_391-9.png\" alt=\"IMG_391\" \/> v\u00e0o \u0111\u1ed3 th\u1ecb c\u1ee7a (C) ta \u0111\u01b0\u1ee3c <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"25\" class=\"wp-image-23646\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_392-10.png\" alt=\"IMG_392\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_392-10.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_392-10-50x25.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> .<\/p>\n<p>T\u01b0\u01a1ng t\u1ef1 c\u00e2u <strong>1, <\/strong>ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23647\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_393-10.png\" alt=\"IMG_393\" \/> l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"97\" height=\"25\" class=\"wp-image-23648\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_394-10.png\" alt=\"IMG_394\" \/><\/p>\n<p><strong><em>Ch\u00fa \u00fd: <\/em><\/strong><\/p>\n<p>Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23649\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_395-10.png\" alt=\"IMG_395\" \/> bi\u1ebft ho\u00e0nh \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"29\" class=\"wp-image-23650\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_396-10.png\" alt=\"IMG_396\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"32\" class=\"wp-image-23651\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_397-10.png\" alt=\"IMG_397\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"32\" class=\"wp-image-23652\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_398-11.png\" alt=\"IMG_398\" \/> ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn: <img loading=\"lazy\" decoding=\"async\" width=\"174\" height=\"32\" class=\"wp-image-23653\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_399-11.png\" alt=\"IMG_399\" \/><\/p>\n<p><strong>3. <\/strong>Thay <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"25\" class=\"wp-image-23654\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_400-11.png\" alt=\"IMG_400\" \/> v\u00e0o \u0111\u1ed3 th\u1ecb c\u1ee7a (C) ta \u0111\u01b0\u1ee3c <img loading=\"lazy\" decoding=\"async\" width=\"164\" height=\"35\" class=\"wp-image-23655\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_401-11.png\" alt=\"IMG_401\" \/> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"52\" height=\"22\" class=\"wp-image-23656\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_402-11.png\" alt=\"IMG_402\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_402-11.png 52w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_402-11-50x22.png 50w\" sizes=\"(max-width: 52px) 100vw, 52px\" \/> .<\/p>\n<p>T\u01b0\u01a1ng t\u1ef1 c\u00e2u <strong>1, <\/strong>ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23657\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_403-11.png\" alt=\"IMG_403\" \/> l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"25\" class=\"wp-image-23658\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_404-11.png\" alt=\"IMG_404\" \/> , <img loading=\"lazy\" decoding=\"async\" width=\"87\" height=\"25\" class=\"wp-image-23659\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_405-11.png\" alt=\"IMG_405\" \/><\/p>\n<p><strong><em>Ch\u00fa \u00fd: <\/em><\/strong>Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"32\" class=\"wp-image-23660\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_406-11.png\" alt=\"IMG_406\" \/> bi\u1ebft tung \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23661\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_407-11.png\" alt=\"IMG_407\" \/> . G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"32\" class=\"wp-image-23662\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_408-11.png\" alt=\"IMG_408\" \/> l\u00e0 ti\u1ebfp \u0111i\u1ec3m<\/p>\n<p>Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"32\" class=\"wp-image-23663\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_409-11.png\" alt=\"IMG_409\" \/> ta t\u00ecm \u0111\u01b0\u1ee3c c\u00e1c nghi\u1ec7m <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"29\" class=\"wp-image-23664\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_410-11.png\" alt=\"IMG_410\" \/> .<\/p>\n<p>T\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"55\" height=\"32\" class=\"wp-image-23665\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_411-11.png\" alt=\"IMG_411\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"19\" class=\"wp-image-23666\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_412-11.png\" alt=\"IMG_412\" \/> ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn: <img loading=\"lazy\" decoding=\"async\" width=\"174\" height=\"32\" class=\"wp-image-23667\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_413-11.png\" alt=\"IMG_413\" \/><\/p>\n<p><strong>4. <\/strong>Tr\u1ee5c tung Oy : <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"25\" class=\"wp-image-23668\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_414-11.png\" alt=\"IMG_414\" \/> .T\u01b0\u01a1ng t\u1ef1 c\u00e2u <strong>1, <\/strong>ph\u01b0\u01a1ng tr\u00ecnh <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23669\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_415-11.png\" alt=\"IMG_415\" \/> l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"42\" height=\"25\" class=\"wp-image-23670\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_416-11.png\" alt=\"IMG_416\" \/><\/p>\n<p><strong>5. <\/strong>G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"32\" class=\"wp-image-23671\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_417-11.png\" alt=\"IMG_417\" \/> l\u00e0 t\u1ecda \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m c\u1ee7a \u0111\u1ed3 th\u1ecb (C ) c\u1ee7a h\u00e0m s\u1ed1 v\u00e0 ti\u1ebfp tuy\u1ebfn <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23672\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_418-11.png\" alt=\"IMG_418\" \/> .<\/p>\n<p>Ta c\u00f3 : <img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"35\" class=\"wp-image-23673\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_419-10.png\" alt=\"IMG_419\" \/> , theo gi\u1ea3 thi\u1ebft <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"32\" class=\"wp-image-23674\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_420-10.png\" alt=\"IMG_420\" \/> , t\u1ee9c l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"105\" height=\"34\" class=\"wp-image-23675\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_421-10.png\" alt=\"IMG_421\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"29\" class=\"wp-image-23676\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_422-10.png\" alt=\"IMG_422\" \/> ho\u1eb7c <img loading=\"lazy\" decoding=\"async\" width=\"50\" height=\"29\" class=\"wp-image-23677\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_423-10.png\" alt=\"IMG_423\" \/> . T\u01b0\u01a1ng t\u1ef1 c\u00e2u <strong>1<\/strong><\/p>\n<p><strong>6. <\/strong>G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"32\" class=\"wp-image-23678\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_424-10.png\" alt=\"IMG_424\" \/> l\u00e0 t\u1ecda \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m c\u1ee7a \u0111\u1ed3 th\u1ecb (C ) c\u1ee7a h\u00e0m s\u1ed1 v\u00e0 ti\u1ebfp tuy\u1ebfn <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23679\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_425-10.png\" alt=\"IMG_425\" \/> .<\/p>\n<p>Theo b\u00e0i to\u00e1n: <img loading=\"lazy\" decoding=\"async\" width=\"69\" height=\"32\" class=\"wp-image-23680\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_426-10.png\" alt=\"IMG_426\" \/> : <img loading=\"lazy\" decoding=\"async\" width=\"102\" height=\"49\" class=\"wp-image-23681\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_427-10.png\" alt=\"IMG_427\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"32\" class=\"wp-image-23682\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_428-10.png\" alt=\"IMG_428\" \/> . T\u01b0\u01a1ng t\u1ef1 c\u00e2u <strong>1<\/strong><\/p>\n<p><strong>7. <\/strong>G\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"32\" class=\"wp-image-23683\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_429-10.png\" alt=\"IMG_429\" \/> l\u00e0 t\u1ecda \u0111\u1ed9 ti\u1ebfp \u0111i\u1ec3m c\u1ee7a \u0111\u1ed3 th\u1ecb (C ) c\u1ee7a h\u00e0m s\u1ed1 v\u00e0 ti\u1ebfp tuy\u1ebfn <img loading=\"lazy\" decoding=\"async\" width=\"27\" height=\"32\" class=\"wp-image-23684\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_430-9.png\" alt=\"IMG_430\" \/> .<\/p>\n<p>Theo b\u00e0i to\u00e1n: <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"32\" class=\"wp-image-23685\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_431-8.png\" alt=\"IMG_431\" \/> : <img loading=\"lazy\" decoding=\"async\" width=\"144\" height=\"49\" class=\"wp-image-23686\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_432-8.png\" alt=\"IMG_432\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"32\" class=\"wp-image-23687\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_433-8.png\" alt=\"IMG_433\" \/> . T\u01b0\u01a1ng t\u1ef1 c\u00e2u <strong>1<\/strong><\/p>\n<p><strong>V\u00ed d\u1ee5 2 . <\/strong><\/p>\n<p><strong>1. <\/strong>Cho h\u00e0m s\u1ed1: <img loading=\"lazy\" decoding=\"async\" width=\"292\" height=\"35\" class=\"wp-image-23688\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_434-8.png\" alt=\"IMG_434\" \/> . T\u00ecm <img loading=\"lazy\" decoding=\"async\" width=\"24\" height=\"15\" class=\"wp-image-23689\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_435-8.png\" alt=\"IMG_435\" \/> \u0111\u1ec3 ti\u1ebfp tuy\u1ebfn c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 t\u1ea1i \u0111i\u1ec3m c\u00f3 ho\u00e0nh \u0111\u1ed9 b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"14\" height=\"20\" class=\"wp-image-23690\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_436-8.png\" alt=\"IMG_436\" \/> \u0111i qua \u0111i\u1ec3m <img loading=\"lazy\" decoding=\"async\" width=\"69\" height=\"32\" class=\"wp-image-23691\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_437-9.png\" alt=\"IMG_437\" \/> .<\/p>\n<p><strong>2. <\/strong>G\u1ecdi (Cm) l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"254\" height=\"32\" class=\"wp-image-23692\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_438-9.png\" alt=\"IMG_438\" \/> v\u00e0 (d) l\u00e0 ti\u1ebfp tuy\u1ebfn c\u1ee7a (C) t\u1ea1i \u0111i\u1ec3m c\u00f3 ho\u00e0nh \u0111\u1ed9 x = 2. T\u00ecm m \u0111\u1ec3 kho\u1ea3ng c\u00e1ch t\u1eeb g\u1ed1c t\u1ecda \u0111\u1ed9 O \u0111\u1ebfn (d) b\u1eb1ng <img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"52\" class=\"wp-image-23693\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_439-9.png\" alt=\"IMG_439\" \/> .<\/p>\n<p><strong>L\u1eddi gi\u1ea3i.<\/strong><\/p>\n<p><strong>1. <\/strong>H\u00e0m s\u1ed1 \u0111\u00e3 cho x\u00e1c \u0111\u1ecbnh v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"20\" class=\"wp-image-23694\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_440-9.png\" alt=\"IMG_440\" \/> .<\/p>\n<p>Ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"224\" height=\"35\" class=\"wp-image-23695\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_441-9.png\" alt=\"IMG_441\" \/><\/p>\n<p>V\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"287\" height=\"32\" class=\"wp-image-23696\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_442-9.png\" alt=\"IMG_442\" \/><\/p>\n<p>Ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn t\u1ea1i \u0111i\u1ec3m c\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"20\" class=\"wp-image-23697\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_443-7.png\" alt=\"IMG_443\" \/> : <img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"32\" class=\"wp-image-23698\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_444-7.png\" alt=\"IMG_444\" \/><\/p>\n<p>Ti\u1ebfp tuy\u1ebfn n\u00e0y \u0111i qua <img loading=\"lazy\" decoding=\"async\" width=\"69\" height=\"32\" class=\"wp-image-23699\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_445-7.png\" alt=\"IMG_445\" \/> n\u00ean c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"229\" height=\"22\" class=\"wp-image-23700\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_446-6.png\" alt=\"IMG_446\" \/><\/p>\n<p>V\u1eady, <img loading=\"lazy\" decoding=\"async\" width=\"59\" height=\"20\" class=\"wp-image-23701\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_447-6.png\" alt=\"IMG_447\" \/> l\u00e0 gi\u00e1 tr\u1ecb c\u1ea7n t\u00ecm.<\/p>\n<p><strong>2. <\/strong>H\u00e0m s\u1ed1 \u0111\u00e3 cho x\u00e1c \u0111\u1ecbnh v\u1edbi <img loading=\"lazy\" decoding=\"async\" width=\"60\" height=\"20\" class=\"wp-image-23702\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_448-6.png\" alt=\"IMG_448\" \/> .<\/p>\n<p>Ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"232\" height=\"35\" class=\"wp-image-23703\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_449-5.png\" alt=\"IMG_449\" \/><\/p>\n<p>Ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn (d) : <img loading=\"lazy\" decoding=\"async\" width=\"165\" height=\"25\" class=\"wp-image-23704\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_450-5.png\" alt=\"IMG_450\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"629\" height=\"32\" class=\"wp-image-23705\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_451-5.png\" alt=\"IMG_451\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_451-5.png 629w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_451-5-300x15.png 300w\" sizes=\"(max-width: 629px) 100vw, 629px\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"527\" height=\"65\" class=\"wp-image-23706\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_452-5.png\" alt=\"IMG_452\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_452-5.png 527w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_452-5-300x37.png 300w\" sizes=\"(max-width: 527px) 100vw, 527px\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"307\" height=\"30\" class=\"wp-image-23707\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_453-5.png\" alt=\"IMG_453\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_453-5.png 307w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_453-5-300x29.png 300w\" sizes=\"(max-width: 307px) 100vw, 307px\" \/> <img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"49\" class=\"wp-image-23708\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_454-5.png\" alt=\"IMG_454\" \/><\/p>","protected":false},"excerpt":{"rendered":"<p>A. CHU\u1ea8N KI\u1ebeN TH\u1ee8C \u00b7 \u00dd ngh\u0129a h\u00ecnh h\u1ecdc c\u1ee7a \u0111\u1ea1o h\u00e0m: \u0110\u1ea1o h\u00e0m c\u1ee7a h\u00e0m s\u1ed1 t\u1ea1i \u0111i\u1ec3m l\u00e0 h\u1ec7 s\u1ed1 g\u00f3c c\u1ee7a ti\u1ebfp tuy\u1ebfn v\u1edbi \u0111\u1ed3 th\u1ecb (C) c\u1ee7a h\u00e0m s\u1ed1 t\u1ea1i \u0111i\u1ec3m . Khi \u0111\u00f3 ph\u01b0\u01a1ng tr\u00ecnh ti\u1ebfp tuy\u1ebfn c\u1ee7a (C) t\u1ea1i \u0111i\u1ec3m l\u00e0: \u00b7 \u0110i\u1ec1u ki\u1ec7n c\u1ea7n v\u00e0 \u0111\u1ee7 \u0111\u1ec3 hai [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[43],"tags":[],"class_list":["post-23510","post","type-post","status-publish","format-standard","hentry","category-toan-lop-12"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/23510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=23510"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/23510\/revisions"}],"predecessor-version":[{"id":23709,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/23510\/revisions\/23709"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=23510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=23510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=23510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}