{"id":22625,"date":"2021-12-17T16:48:10","date_gmt":"2021-12-17T09:48:10","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=22625"},"modified":"2021-12-17T16:48:12","modified_gmt":"2021-12-17T09:48:12","slug":"bai-toan-van-dung-cao-nguyen-ham-tich-phan","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-toan-van-dung-cao-nguyen-ham-tich-phan\/","title":{"rendered":"B\u00c0I TO\u00c1N V\u1eacN D\u1ee4NG CAO NGUY\u00caN H\u00c0M, T\u00cdCH PH\u00c2N"},"content":{"rendered":"\n<p><\/p>\n\n\n<p><a id=\"post-22625-_Toc492701526\"><\/a><a id=\"post-22625-_Toc493273876\"><\/a><strong>CH\u1ee6 \u0110\u1ec0 1.<\/strong><\/p>\n<p><strong>C\u00c1C B\u00c0I TO\u00c1N NGUY\u00caN H\u00c0M<\/strong><\/p>\n<p>\u0110\u1ea7u ti\u00ean xin nh\u1eafc l\u1ea1i c\u00e1c kh\u00e1i ni\u1ec7m v\u00e0 \u0111\u1ecbnh l\u00ed c\u0103n b\u1ea3n \u0111\u1ec3 qu\u00fd b\u1ea1n \u0111\u1ecdc c\u00f3 ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng tr\u01b0\u1edbc khi \u0111i v\u00e0o c\u00e1c b\u00e0i to\u00e1n c\u1ee5 th\u1ec3.<\/p>\n<p><strong>1. \u0110\u1ecbnh ngh\u0129a<\/strong><\/p>\n<p>Cho h\u00e0m s\u1ed1 <img decoding=\"async\" width=\"87\" height=\"34\" class=\"wp-image-22626\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_256-32.png\" alt=\"IMG_256\" \/> x\u00e1c \u0111\u1ecbnh tr\u00ean t\u1eadp K (kho\u1ea3ng, n\u1eeda kho\u1ea3ng, \u0111o\u1ea1n c\u1ee7a R). N\u1ebfu Ta c\u00f3 h\u00e0m s\u1ed1 <img decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22627\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_257-31.png\" alt=\"IMG_257\" \/> x\u00e1c \u0111\u1ecbnh tr\u00ean K sao cho <img decoding=\"async\" width=\"126\" height=\"34\" class=\"wp-image-22628\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_258-32.png\" alt=\"IMG_258\" \/> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22629\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_259-30.png\" alt=\"IMG_259\" \/> \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nguy\u00ean h\u00e0m c\u1ee7a h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22630\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_260-32.png\" alt=\"IMG_260\" \/> tr\u00ean K.<\/p>\n<p><strong>\u0110\u1ecbnh l\u00ed 1<\/strong>. N\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22631\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_261-29.png\" alt=\"IMG_261\" \/> l\u00e0 m\u1ed9t nguy\u00ean h\u00e0m c\u1ee7a h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22632\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_262-30.png\" alt=\"IMG_262\" \/> tr\u00ean K th\u00ec v\u1edbi m\u1ed7i h\u1eb1ng s\u1ed1 C, h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"156\" height=\"34\" class=\"wp-image-22633\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_263-31.png\" alt=\"IMG_263\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_263-31.png 156w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_263-31-150x34.png 150w\" sizes=\"(max-width: 156px) 100vw, 156px\" \/> c\u0169ng l\u00e0 m\u1ed9t nguy\u00ean h\u00e0m c\u1ee7a h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22634\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_264-30.png\" alt=\"IMG_264\" \/> tr\u00ean K.<\/p>\n<p><strong>\u0110\u1ecbnh l\u00ed 2<\/strong>. N\u1ebfu <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22635\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_265-30.png\" alt=\"IMG_265\" \/> l\u00e0 m\u1ed9t nguy\u00ean h\u00e0m c\u1ee7a h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22636\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_266-30.png\" alt=\"IMG_266\" \/> tr\u00ean K th\u00ec m\u1ecdi nguy\u00ean h\u00e0m c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22637\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_267-31.png\" alt=\"IMG_267\" \/> tr\u00ean K \u0111\u1ec1u c\u00f3 d\u1ea1ng <img loading=\"lazy\" decoding=\"async\" width=\"156\" height=\"34\" class=\"wp-image-22638\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_268-31.png\" alt=\"IMG_268\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_268-31.png 156w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_268-31-150x34.png 150w\" sizes=\"(max-width: 156px) 100vw, 156px\" \/> v\u1edbi C l\u00e0 h\u1eb1ng s\u1ed1.<\/p>\n<p>\u0110\u1ecbnh l\u00ed 3. M\u1ecdi h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22639\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_269-31.png\" alt=\"IMG_269\" \/> li\u00ean t\u1ee5c tr\u00ean K \u0111\u1ec1u c\u00f3 nguy\u00ean h\u00e0m tr\u00ean K.<\/p>\n<p><strong>2. T\u00ednh ch\u1ea5t c\u1ee7a nguy\u00ean h\u00e0m:<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"196\" height=\"40\" class=\"wp-image-22640\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_270-29.png\" alt=\"IMG_270\" \/> v\u1edbi C l\u00e0 h\u1eb1ng s\u1ed1.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"209\" height=\"40\" class=\"wp-image-22641\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_271-31.png\" alt=\"IMG_271\" \/> v\u1edbi k l\u00e0 h\u1eb1ng s\u1ed1 kh\u00e1c 0.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"421\" height=\"40\" class=\"wp-image-22642\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_272-31.png\" alt=\"IMG_272\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_272-31.png 421w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_272-31-300x29.png 300w\" sizes=\"(max-width: 421px) 100vw, 421px\" \/><\/p>\n<p><strong>B\u1ea3ng nguy\u00ean h\u00e0m<\/strong><\/p>\n<p>Ch\u00fa \u00fd: c\u00f4ng th\u1ee9c t\u00ednh vi ph\u00e2n c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22643\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_273-29.png\" alt=\"IMG_273\" \/> l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"184\" height=\"37\" class=\"wp-image-22644\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_274-30.png\" alt=\"IMG_274\" \/><\/p>\n<table>\n<tbody>\n<tr>\n<td>\u00a0<\/td>\n<td>\n<p><strong>V\u1edbi <em>u<\/em> l\u00e0 m\u1ed9t h\u00e0m s\u1ed1<\/strong><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"40\" class=\"wp-image-22645\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_275-29.png\" alt=\"IMG_275\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"90\" height=\"40\" class=\"wp-image-22646\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_276-30.png\" alt=\"IMG_276\" \/><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"109\" height=\"40\" class=\"wp-image-22647\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_277-30.png\" alt=\"IMG_277\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"110\" height=\"40\" class=\"wp-image-22648\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_278-31.png\" alt=\"IMG_278\" \/><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"277\" height=\"57\" class=\"wp-image-22649\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_279-29.png\" alt=\"IMG_279\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"279\" height=\"57\" class=\"wp-image-22650\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_280-31.png\" alt=\"IMG_280\" \/> \u00a0<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"152\" height=\"57\" class=\"wp-image-22651\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_281-30.png\" alt=\"IMG_281\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_281-30.png 152w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_281-30-150x57.png 150w\" sizes=\"(max-width: 152px) 100vw, 152px\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"154\" height=\"57\" class=\"wp-image-22652\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_282-31.png\" alt=\"IMG_282\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_282-31.png 154w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_282-31-150x57.png 150w\" sizes=\"(max-width: 154px) 100vw, 154px\" \/> \u00a0<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"40\" class=\"wp-image-22653\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_283-30.png\" alt=\"IMG_283\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"135\" height=\"40\" class=\"wp-image-22654\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_284-30.png\" alt=\"IMG_284\" \/><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"151\" height=\"59\" class=\"wp-image-22655\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_285-31.png\" alt=\"IMG_285\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"151\" height=\"59\" class=\"wp-image-22656\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_286-30.png\" alt=\"IMG_286\" \/> \u00a0<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"177\" height=\"40\" class=\"wp-image-22657\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_287-31.png\" alt=\"IMG_287\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"179\" height=\"40\" class=\"wp-image-22658\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_288-31.png\" alt=\"IMG_288\" \/><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"192\" height=\"40\" class=\"wp-image-22659\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_289-32.png\" alt=\"IMG_289\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"188\" height=\"40\" class=\"wp-image-22660\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_290-31.png\" alt=\"IMG_290\" \/><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"196\" height=\"57\" class=\"wp-image-22661\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_291-31.png\" alt=\"IMG_291\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"197\" height=\"57\" class=\"wp-image-22662\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_292-31.png\" alt=\"IMG_292\" \/><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"207\" height=\"57\" class=\"wp-image-22663\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_293-31.png\" alt=\"IMG_293\" \/> \u00a0<\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"209\" height=\"57\" class=\"wp-image-22664\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_294-30.png\" alt=\"IMG_294\" \/><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u m\u1ed9t s\u1ed1 b\u00e0i to\u00e1n Nguy\u00ean H\u00e0m \u1edf m\u1ee9c \u0111\u1ed9 v\u1eadn d\u1ee5ng sau \u0111\u00e2y:<\/p>\n<p><strong>B\u00c0I T\u1eacP V\u1eacN D\u1ee4NG<\/strong><\/p>\n<p>B\u00e0i 1: Bi\u1ebft <img loading=\"lazy\" decoding=\"async\" width=\"379\" height=\"59\" class=\"wp-image-22665\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_295-29.png\" alt=\"IMG_295\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_295-29.png 379w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_295-29-300x47.png 300w\" sizes=\"(max-width: 379px) 100vw, 379px\" \/> . V\u1edbi <em>a<\/em> l\u00e0 s\u1ed1 nguy\u00ean. T\u00ecm <em>a<\/em>?<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"23\" class=\"wp-image-22666\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_296-29.png\" alt=\"IMG_296\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"23\" class=\"wp-image-22667\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_297-29.png\" alt=\"IMG_297\" \/> C. <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"23\" class=\"wp-image-22668\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_298-29.png\" alt=\"IMG_298\" \/> D. <img loading=\"lazy\" decoding=\"async\" width=\"64\" height=\"23\" class=\"wp-image-22669\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_299-30.png\" alt=\"IMG_299\" \/><\/p>\n<p>Gi\u1ea3i:<\/p>\n<p>\u0110\u1eb7t <img loading=\"lazy\" decoding=\"async\" width=\"308\" height=\"45\" class=\"wp-image-22670\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_300-30.png\" alt=\"IMG_300\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_300-30.png 308w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_300-30-300x44.png 300w\" sizes=\"(max-width: 308px) 100vw, 308px\" \/> , Ta c\u00f3:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"552\" height=\"89\" class=\"wp-image-22671\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_301-30.png\" alt=\"IMG_301\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_301-30.png 552w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_301-30-300x48.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/p>\n<p>\u0110\u1eb7t <img loading=\"lazy\" decoding=\"async\" width=\"255\" height=\"26\" class=\"wp-image-22672\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_302-30.png\" alt=\"IMG_302\" \/><\/p>\n<p>V\u1eady <img loading=\"lazy\" decoding=\"async\" width=\"358\" height=\"59\" class=\"wp-image-22673\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_303-30.png\" alt=\"IMG_303\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_303-30.png 358w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_303-30-300x49.png 300w\" sizes=\"(max-width: 358px) 100vw, 358px\" \/><\/p>\n<p>Ch\u1ecdn C.<\/p>\n<p>\u00a0<\/p>\n<p>B\u00e0i 2: Bi\u1ebft <img loading=\"lazy\" decoding=\"async\" width=\"346\" height=\"57\" class=\"wp-image-22674\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_304-30.png\" alt=\"IMG_304\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_304-30.png 346w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_304-30-300x49.png 300w\" sizes=\"(max-width: 346px) 100vw, 346px\" \/> . V\u1edbi <em>a<\/em> l\u00e0 s\u1ed1 nguy\u00ean. T\u00ecm <em>a<\/em>?<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"23\" class=\"wp-image-22675\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_305-30.png\" alt=\"IMG_305\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_305-30.png 53w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_305-30-50x23.png 50w\" sizes=\"(max-width: 53px) 100vw, 53px\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"23\" class=\"wp-image-22676\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_306-30.png\" alt=\"IMG_306\" \/> C. <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"23\" class=\"wp-image-22677\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_307-30.png\" alt=\"IMG_307\" \/> D. <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"23\" class=\"wp-image-22678\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_308-30.png\" alt=\"IMG_308\" \/><\/p>\n<p>Gi\u1ea3i:<\/p>\n<p>V\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"497\" height=\"68\" class=\"wp-image-22679\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_309-29.png\" alt=\"IMG_309\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_309-29.png 497w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_309-29-300x41.png 300w\" sizes=\"(max-width: 497px) 100vw, 497px\" \/> n\u00ean<\/p>\n<p>Nguy\u00ean h\u00e0m c\u1ee7a: <img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"57\" class=\"wp-image-22680\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_310-30.png\" alt=\"IMG_310\" \/> l\u00e0: <img loading=\"lazy\" decoding=\"async\" width=\"168\" height=\"34\" class=\"wp-image-22681\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_311-29.png\" alt=\"IMG_311\" \/> .<\/p>\n<p>CH\u1ecdn A.<\/p>\n<p>B\u00e0i 3: T\u00ecm m\u1ed9t nguy\u00ean h\u00e0m c\u1ee7a: <img loading=\"lazy\" decoding=\"async\" width=\"165\" height=\"117\" class=\"wp-image-22682\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_312-29.png\" alt=\"IMG_312\" \/> bi\u1ebft nguy\u00ean h\u00e0m n\u00e0y b\u1eb1ng 3 khi <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"57\" class=\"wp-image-22683\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_313-28.png\" alt=\"IMG_313\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_313-28.png 57w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_313-28-50x50.png 50w\" sizes=\"(max-width: 57px) 100vw, 57px\" \/> .<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"95\" height=\"57\" class=\"wp-image-22684\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_314-28.png\" alt=\"IMG_314\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"92\" height=\"57\" class=\"wp-image-22685\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_315-28.png\" alt=\"IMG_315\" \/> C. <img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"23\" class=\"wp-image-22686\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_316-28.png\" alt=\"IMG_316\" \/> . D. <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"23\" class=\"wp-image-22687\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_317-28.png\" alt=\"IMG_317\" \/> .<\/p>\n<p>Gi\u1ea3i:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"570\" height=\"124\" class=\"wp-image-22688\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_318-28.png\" alt=\"IMG_318\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_318-28.png 570w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_318-28-300x65.png 300w\" sizes=\"(max-width: 570px) 100vw, 570px\" \/><\/p>\n<p>Nguy\u00ean h\u00e0m c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"151\" height=\"34\" class=\"wp-image-22689\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_319-28.png\" alt=\"IMG_319\" \/><\/p>\n<p>Ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"491\" height=\"62\" class=\"wp-image-22690\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_320-28.png\" alt=\"IMG_320\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_320-28.png 491w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_320-28-300x38.png 300w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_320-28-480x62.png 480w\" sizes=\"(max-width: 491px) 100vw, 491px\" \/><\/p>\n<p>Ch\u1ecdn C.<\/p>\n<p>B\u00e0i 4: <img loading=\"lazy\" decoding=\"async\" width=\"247\" height=\"34\" class=\"wp-image-22691\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_321-27.png\" alt=\"IMG_321\" \/> l\u00e0 nguy\u00ean h\u00e0m c\u1ee7a:<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"57\" class=\"wp-image-22692\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_322-27.png\" alt=\"IMG_322\" \/> . B. <img loading=\"lazy\" decoding=\"async\" width=\"126\" height=\"57\" class=\"wp-image-22693\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_323-25.png\" alt=\"IMG_323\" \/> . C. <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"57\" class=\"wp-image-22694\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_324-25.png\" alt=\"IMG_324\" \/> . D. <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"57\" class=\"wp-image-22695\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_325-25.png\" alt=\"IMG_325\" \/> .<\/p>\n<p>Gi\u1ea3i:<\/p>\n<p>Ta ch\u1ec9 c\u1ea7n \u0111\u1ea1o h\u00e0m c\u1ee7a F(x), r\u1ed3i sau \u0111\u00f3 quan s\u00e1t k\u1ebft qu\u1ea3 \u0111\u00fang.<\/p>\n<p>Ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"552\" height=\"61\" class=\"wp-image-22696\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_326-25.png\" alt=\"IMG_326\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_326-25.png 552w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_326-25-300x33.png 300w\" sizes=\"(max-width: 552px) 100vw, 552px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"79\" height=\"34\" class=\"wp-image-22697\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_327-25.png\" alt=\"IMG_327\" \/> l\u00e0 m\u1ed9t nguy\u00ean h\u00e0m c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"57\" class=\"wp-image-22698\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_328-24.png\" alt=\"IMG_328\" \/> .<\/p>\n<p>Ch\u1ecdn D.<\/p>\n<p>\u00a0<\/p>\n<p>B\u00e0i 5: Bi\u1ebft <img loading=\"lazy\" decoding=\"async\" width=\"354\" height=\"68\" class=\"wp-image-22699\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_329-24.png\" alt=\"IMG_329\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_329-24.png 354w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_329-24-300x58.png 300w\" sizes=\"(max-width: 354px) 100vw, 354px\" \/> . V\u1edbi <em>a<\/em> l\u00e0 s\u1ed1 nguy\u00ean. T\u00ecm <em>a<\/em>?<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"23\" class=\"wp-image-22700\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_330-24.png\" alt=\"IMG_330\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"23\" class=\"wp-image-22701\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_331-24.png\" alt=\"IMG_331\" \/> C. <img loading=\"lazy\" decoding=\"async\" width=\"56\" height=\"23\" class=\"wp-image-22702\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_332-24.png\" alt=\"IMG_332\" \/> D. <img loading=\"lazy\" decoding=\"async\" width=\"65\" height=\"23\" class=\"wp-image-22703\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_333-24.png\" alt=\"IMG_333\" \/><\/p>\n<p>Gi\u1ea3i:<\/p>\n<p><strong>Ch\u00fa \u00fd<\/strong> n\u1ebfu ch\u00fang ta bi\u1ebfn \u0111\u1ed5i:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"629\" height=\"85\" class=\"wp-image-22704\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_334-23.png\" alt=\"IMG_334\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_334-23.png 629w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_334-23-300x41.png 300w\" sizes=\"(max-width: 629px) 100vw, 629px\" \/> . <strong>L\u00e0 sai<\/strong><\/p>\n<p>\u0110i\u1ec1u sau \u0111\u00e2y m\u1edbi \u0111\u00fang: <img loading=\"lazy\" decoding=\"async\" width=\"554\" height=\"70\" class=\"wp-image-22705\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_335-23.png\" alt=\"IMG_335\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_335-23.png 554w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_335-23-300x38.png 300w\" sizes=\"(max-width: 554px) 100vw, 554px\" \/><\/p>\n<p>Tr\u1edf l\u1ea1i b\u00e0i, ta s\u1ebd bi\u1ebfn \u0111\u1ed5i bi\u1ec3u th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"156\" height=\"45\" class=\"wp-image-22706\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_336-23.png\" alt=\"IMG_336\" \/> v\u1ec1 d\u1ea1ng <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"39\" class=\"wp-image-22707\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_337-23.png\" alt=\"IMG_337\" \/> nh\u01b0 sau:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"475\" height=\"148\" class=\"wp-image-22708\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_338-23.png\" alt=\"IMG_338\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_338-23.png 475w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_338-23-300x93.png 300w\" sizes=\"(max-width: 475px) 100vw, 475px\" \/><\/p>\n<p>Ch\u1ecdn D.<\/p>\n<p>\u00a0<\/p>\n<p><strong>CH\u1ee6 \u0110\u1ec0 2.<\/strong><\/p>\n<p><strong>C\u00c1C B\u00c0I TO\u00c1N T\u00cdCH PH\u00c2N.<\/strong><\/p>\n<p><strong>1. \u0110\u1ecbnh ngh\u0129a<\/strong><\/p>\n<p>Cho h\u00e0m s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"87\" height=\"34\" class=\"wp-image-22709\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_437-7.png\" alt=\"IMG_437\" \/> th\u1ecfa:<\/p>\n<p>+ Li\u00ean t\u1ee5c tr\u00ean \u0111o\u1ea1n <img loading=\"lazy\" decoding=\"async\" width=\"51\" height=\"36\" class=\"wp-image-22710\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_438-7.png\" alt=\"IMG_438\" \/> .<\/p>\n<p>+ <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22711\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_439-7.png\" alt=\"IMG_439\" \/> l\u00e0 nguy\u00ean h\u00e0m c\u1ee7a <img loading=\"lazy\" decoding=\"async\" width=\"53\" height=\"34\" class=\"wp-image-22712\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_440-7.png\" alt=\"IMG_440\" \/> tr\u00ean \u0111o\u1ea1n <img loading=\"lazy\" decoding=\"async\" width=\"51\" height=\"36\" class=\"wp-image-22713\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_441-7.png\" alt=\"IMG_441\" \/> .<\/p>\n<p>L\u00fac \u0111\u00f3 hi\u1ec7u s\u1ed1 <img loading=\"lazy\" decoding=\"async\" width=\"118\" height=\"34\" class=\"wp-image-22714\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_442-7.png\" alt=\"IMG_442\" \/> \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u00edch ph\u00e2n t\u1eeb <em>a<\/em> \u0111\u1ebfn <em>b<\/em> v\u00e0 k\u00ed hi\u1ec7u <img loading=\"lazy\" decoding=\"async\" width=\"222\" height=\"67\" class=\"wp-image-22715\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_443-6.png\" alt=\"IMG_443\" \/><\/p>\n<p><strong>Ch\u00fa \u00fd:<\/strong><\/p>\n<p>+ <em>a, b<\/em> \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 2 c\u1eadn c\u1ee7a t\u00edch ph\u00e2n.<\/p>\n<p>+ <em>a<\/em> = <em>b<\/em> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"67\" class=\"wp-image-22716\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_444-6.png\" alt=\"IMG_444\" \/><\/p>\n<p>+ <em>a<\/em> &gt; <em>b<\/em> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"67\" class=\"wp-image-22717\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_445-6.png\" alt=\"IMG_445\" \/> .<\/p>\n<p>+ T\u00edch ph\u00e2n kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0 bi\u1ebfn s\u1ed1, t\u1ee9c l\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"317\" height=\"67\" class=\"wp-image-22718\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_446-5.png\" alt=\"IMG_446\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_446-5.png 317w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_446-5-300x63.png 300w\" sizes=\"(max-width: 317px) 100vw, 317px\" \/> .<\/p>\n<p><strong>2. T\u00ednh ch\u1ea5t c\u1ee7a t\u00edch ph\u00e2n:<\/strong><\/p>\n<p>+ <img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"67\" class=\"wp-image-22719\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_447-5.png\" alt=\"IMG_447\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_447-5.png 400w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_447-5-300x50.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/> .<\/p>\n<p>+ <img loading=\"lazy\" decoding=\"async\" width=\"213\" height=\"67\" class=\"wp-image-22720\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_448-5.png\" alt=\"IMG_448\" \/> v\u1edbi k l\u00e0 h\u1eb1ng s\u1ed1 kh\u00e1c 0.<\/p>\n<p>+ <img loading=\"lazy\" decoding=\"async\" width=\"372\" height=\"67\" class=\"wp-image-22721\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_449-4.png\" alt=\"IMG_449\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_449-4.png 372w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_449-4-300x54.png 300w\" sizes=\"(max-width: 372px) 100vw, 372px\" \/> .<\/p>\n<p><strong>Ch\u00fa \u00fd:<\/strong><\/p>\n<p>\u0110\u1ec3 t\u00ednh t\u00edch ph\u00e2n t\u1eeb a \u0111\u1ebfn b, ta ti\u1ebfn h\u00e0nh t\u00ecm nguy\u00ean h\u00e0m r\u1ed3i sau \u0111\u00f3 thay c\u1eadn v\u00e0o theo c\u00f4ng th\u1ee9c <img loading=\"lazy\" decoding=\"async\" width=\"222\" height=\"67\" class=\"wp-image-22722\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_450-4.png\" alt=\"IMG_450\" \/> .<\/p>\n<p>B\u00c0I T\u1eacP \u00c1P D\u1ee4NG<\/p>\n<p>M\u1ed9t l\u1ea7n n\u1eefa xin nh\u1eafc l\u1ea1i r\u1eb1ng \u0111\u00e2y l\u00e0 cu\u1ed1n s\u00e1ch \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c b\u00e0i to\u00e1n v\u1eadn d\u1ee5ng v\u00e0 v\u1eadn d\u1ee5ng cao n\u00ean tr\u01b0\u1edbc khi s\u1eed d\u1ee5ng s\u00e1ch n\u00e0y qu\u00fd b\u1ea1n \u0111\u1ecdc c\u1ea7n c\u00f3 ki\u1ebfn thwucs c\u01a1 b\u1ea3n t\u1ed1t. B\u00e2y gi\u1edd ch\u00fang ta c\u00f9ng nghi\u00ean c\u1ee9u c\u00e1c b\u00e0i to\u00e1n t\u00edch ph\u00e2n kh\u00e1 kh\u00f3:<\/p>\n<p>B\u00e0i 1: N\u1ebfu a l\u00e0 m\u1ed9t s\u1ed1 th\u1ecfa m\u00e3n c\u00e1c \u0111i\u1ec1u ki\u1ec7n sau: <img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"62\" class=\"wp-image-22723\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_451-4.png\" alt=\"IMG_451\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"199\" height=\"67\" class=\"wp-image-22724\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_452-4.png\" alt=\"IMG_452\" \/> th\u00ec:<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"57\" height=\"19\" class=\"wp-image-22725\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_453-4.png\" alt=\"IMG_453\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"70\" height=\"32\" class=\"wp-image-22726\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_454-4.png\" alt=\"IMG_454\" \/> . C. <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"32\" class=\"wp-image-22727\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_455-4.png\" alt=\"IMG_455\" \/> D. <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"32\" class=\"wp-image-22728\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_456-4.png\" alt=\"IMG_456\" \/> .<\/p>\n<p>Gi\u1ea3i:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"603\" height=\"127\" class=\"wp-image-22729\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_457-4.png\" alt=\"IMG_457\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_457-4.png 603w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_457-4-300x63.png 300w\" sizes=\"(max-width: 603px) 100vw, 603px\" \/><\/p>\n<p>V\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"62\" class=\"wp-image-22730\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_458-4.png\" alt=\"IMG_458\" \/> n\u00ean <img loading=\"lazy\" decoding=\"async\" width=\"222\" height=\"62\" class=\"wp-image-22731\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_459-4.png\" alt=\"IMG_459\" \/> , v\u1eady:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"447\" height=\"59\" class=\"wp-image-22732\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_460-4.png\" alt=\"IMG_460\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_460-4.png 447w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_460-4-300x40.png 300w\" sizes=\"(max-width: 447px) 100vw, 447px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"659\" height=\"123\" class=\"wp-image-22733\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_461-4.png\" alt=\"IMG_461\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_461-4.png 659w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_461-4-300x56.png 300w\" sizes=\"(max-width: 659px) 100vw, 659px\" \/> .<\/p>\n<p>V\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"54\" height=\"26\" class=\"wp-image-22734\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_462-3.png\" alt=\"IMG_462\" \/> n\u00ean (1) kh\u00f4ng th\u1ecfa m\u00e3n v\u1edbi m\u1ecdi <img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"62\" class=\"wp-image-22735\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_463-3.png\" alt=\"IMG_463\" \/> ,ho\u1eb7c thay 4 v\u00e0o \u0111\u00e1p \u00e1n (1) ta th\u1ea5y \u0111\u1ec1u kh\u00f4ng th\u1ecfa.<\/p>\n<p>\u0110\u1ed1i v\u1edbi (2). V\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"62\" class=\"wp-image-22736\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_464-3.png\" alt=\"IMG_464\" \/> n\u00ean ch\u1ecdn <em>l<\/em>=1 l\u00fac \u0111\u00f3 <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"32\" class=\"wp-image-22737\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_465-3.png\" alt=\"IMG_465\" \/> .<\/p>\n<p>Ch\u1ecdn D.<\/p>\n<p>\u00a0<\/p>\n<p>B\u00e0i 2: G\u1ecdi <em>S<\/em> l\u00e0 t\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 nguy\u00ean d\u01b0\u01a1ng <em>k<\/em> th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n <img loading=\"lazy\" decoding=\"async\" width=\"134\" height=\"65\" class=\"wp-image-22738\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_466-3.png\" alt=\"IMG_466\" \/> . Khi \u0111\u00f3:<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"70\" height=\"34\" class=\"wp-image-22739\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_467-3.png\" alt=\"IMG_467\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"70\" height=\"34\" class=\"wp-image-22740\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_468-3.png\" alt=\"IMG_468\" \/> . C. <img loading=\"lazy\" decoding=\"async\" width=\"84\" height=\"34\" class=\"wp-image-22741\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_469-3.png\" alt=\"IMG_469\" \/> D. <img loading=\"lazy\" decoding=\"async\" width=\"59\" height=\"23\" class=\"wp-image-22742\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_470-3.png\" alt=\"IMG_470\" \/> .<\/p>\n<p>Gi\u1ea3i:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"74\" height=\"65\" class=\"wp-image-22743\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_471-3.png\" alt=\"IMG_471\" \/><\/p>\n<p>D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p t\u00edch ph\u00e2n t\u1eebng ph\u1ea7n<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"317\" height=\"92\" class=\"wp-image-22744\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_472-3.png\" alt=\"IMG_472\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_472-3.png 317w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_472-3-300x87.png 300w\" sizes=\"(max-width: 317px) 100vw, 317px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"369\" height=\"67\" class=\"wp-image-22745\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_473-3.png\" alt=\"IMG_473\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_473-3.png 369w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_473-3-300x54.png 300w\" sizes=\"(max-width: 369px) 100vw, 369px\" \/><\/p>\n<p>V\u1eady <img loading=\"lazy\" decoding=\"async\" width=\"399\" height=\"65\" class=\"wp-image-22746\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_474-3.png\" alt=\"IMG_474\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_474-3.png 399w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_474-3-300x49.png 300w\" sizes=\"(max-width: 399px) 100vw, 399px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"484\" height=\"34\" class=\"wp-image-22747\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_475-3.png\" alt=\"IMG_475\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_475-3.png 484w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_475-3-300x21.png 300w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_475-3-480x34.png 480w\" sizes=\"(max-width: 484px) 100vw, 484px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"26\" class=\"wp-image-22748\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_476-3.png\" alt=\"IMG_476\" \/> m\u00e0 k l\u00e0 s\u1ed1 nguy\u00ean d\u01b0\u01a1ng n\u00ean ch\u1ecdn <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"34\" class=\"wp-image-22749\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_477-3.png\" alt=\"IMG_477\" \/> .<\/p>\n<p>Ch\u1ecdn C.<\/p>\n<p>B\u00e0i 3: X\u00e9t t\u00edch ph\u00e2n <img loading=\"lazy\" decoding=\"async\" width=\"254\" height=\"84\" class=\"wp-image-22750\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_478-3.png\" alt=\"IMG_478\" \/> . B\u1eb1ng c\u00e1ch \u0111\u1eb7t <img loading=\"lazy\" decoding=\"async\" width=\"82\" height=\"26\" class=\"wp-image-22751\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_479-3.png\" alt=\"IMG_479\" \/> t\u00edch ph\u00e2n A \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i th\u00e0nh t\u00edch ph\u00e2n n\u00e0o sau \u0111\u00e2y.<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"67\" class=\"wp-image-22752\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_480-3.png\" alt=\"IMG_480\" \/> . B. <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"67\" class=\"wp-image-22753\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_481-3.png\" alt=\"IMG_481\" \/> . C. <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"67\" class=\"wp-image-22754\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_482-3.png\" alt=\"IMG_482\" \/> . D. <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"67\" class=\"wp-image-22755\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_483-3.png\" alt=\"IMG_483\" \/> .<\/p>\n<p>Gi\u1ea3i:<\/p>\n<p>Ta c\u00f3: <img loading=\"lazy\" decoding=\"async\" width=\"445\" height=\"62\" class=\"wp-image-22756\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_484-3.png\" alt=\"IMG_484\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_484-3.png 445w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_484-3-300x42.png 300w\" sizes=\"(max-width: 445px) 100vw, 445px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"489\" height=\"44\" class=\"wp-image-22757\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_485-3.png\" alt=\"IMG_485\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_485-3.png 489w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_485-3-300x27.png 300w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_485-3-480x44.png 480w\" sizes=\"(max-width: 489px) 100vw, 489px\" \/><\/p>\n<p>V\u1eady: <img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"89\" class=\"wp-image-22758\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_486-3.png\" alt=\"IMG_486\" \/> , l\u00fac n\u00e0y \u0111\u1eb7t <img loading=\"lazy\" decoding=\"async\" width=\"77\" height=\"22\" class=\"wp-image-22759\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_487-3.png\" alt=\"IMG_487\" \/> v\u00e0 \u0111\u1ed5i c\u1eadn ta \u0111c:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"126\" height=\"67\" class=\"wp-image-22760\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_488-3.png\" alt=\"IMG_488\" \/> . Ch\u1ecdn A.<\/p>\n<p>B\u00e0i 4: \u0110\u1eb7t <img loading=\"lazy\" decoding=\"async\" width=\"81\" height=\"57\" class=\"wp-image-22761\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_489-3.png\" alt=\"IMG_489\" \/> th\u00ec <img loading=\"lazy\" decoding=\"async\" width=\"131\" height=\"104\" class=\"wp-image-22762\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_490-3.png\" alt=\"IMG_490\" \/> \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i th\u00e0nh <img loading=\"lazy\" decoding=\"async\" width=\"89\" height=\"67\" class=\"wp-image-22763\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_491-2.png\" alt=\"IMG_491\" \/> . H\u00e3y x\u00e1c \u0111\u1ecbnh <img loading=\"lazy\" decoding=\"async\" width=\"47\" height=\"34\" class=\"wp-image-22764\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_492-2.png\" alt=\"IMG_492\" \/> :<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"36\" class=\"wp-image-22765\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_493-2.png\" alt=\"IMG_493\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"162\" height=\"36\" class=\"wp-image-22766\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_494-2.png\" alt=\"IMG_494\" \/> C. <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"36\" class=\"wp-image-22767\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_495-2.png\" alt=\"IMG_495\" \/> D. <img loading=\"lazy\" decoding=\"async\" width=\"115\" height=\"36\" class=\"wp-image-22768\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_496-2.png\" alt=\"IMG_496\" \/><\/p>\n<p>Gi\u1ea3i:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"449\" height=\"115\" class=\"wp-image-22769\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_497-2.png\" alt=\"IMG_497\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_497-2.png 449w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_497-2-300x77.png 300w\" sizes=\"(max-width: 449px) 100vw, 449px\" \/><\/p>\n<p>\u0110\u1eb7t <img loading=\"lazy\" decoding=\"async\" width=\"360\" height=\"143\" class=\"wp-image-22770\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_498-2.png\" alt=\"IMG_498\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_498-2.png 360w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_498-2-300x119.png 300w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><\/p>\n<p>V\u1eady: <img loading=\"lazy\" decoding=\"async\" width=\"509\" height=\"67\" class=\"wp-image-22771\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_499-2.png\" alt=\"IMG_499\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_499-2.png 509w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_499-2-300x39.png 300w\" sizes=\"(max-width: 509px) 100vw, 509px\" \/><\/p>\n<p>Ch\u1ecdn B.<\/p>\n<p>\u00a0<\/p>\n<p>B\u00e0i 5: Bi\u1ebft <img loading=\"lazy\" decoding=\"async\" width=\"118\" height=\"67\" class=\"wp-image-22772\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_500-2.png\" alt=\"IMG_500\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"67\" class=\"wp-image-22773\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_501-2.png\" alt=\"IMG_501\" \/> . T\u00ednh <img loading=\"lazy\" decoding=\"async\" width=\"85\" height=\"67\" class=\"wp-image-22774\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_502-2.png\" alt=\"IMG_502\" \/> .<\/p>\n<p>A. <img loading=\"lazy\" decoding=\"async\" width=\"34\" height=\"57\" class=\"wp-image-22775\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_503-2.png\" alt=\"IMG_503\" \/> B. <img loading=\"lazy\" decoding=\"async\" width=\"36\" height=\"57\" class=\"wp-image-22776\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_504-2.png\" alt=\"IMG_504\" \/> C. <img loading=\"lazy\" decoding=\"async\" width=\"51\" height=\"57\" class=\"wp-image-22777\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_505-2.png\" alt=\"IMG_505\" \/> D. <img loading=\"lazy\" decoding=\"async\" width=\"48\" height=\"57\" class=\"wp-image-22778\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_506-2.png\" alt=\"IMG_506\" \/><\/p>\n<p>Gi\u1ea3i:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"288\" height=\"67\" class=\"wp-image-22779\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_507-2.png\" alt=\"IMG_507\" \/> .<\/p>\n<p>M\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"221\" height=\"67\" class=\"wp-image-22780\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_508-2.png\" alt=\"IMG_508\" \/> v\u00e0 <img loading=\"lazy\" decoding=\"async\" width=\"213\" height=\"67\" class=\"wp-image-22781\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_509-2.png\" alt=\"IMG_509\" \/><\/p>\n<p>N\u00ean: <img loading=\"lazy\" decoding=\"async\" width=\"391\" height=\"67\" class=\"wp-image-22782\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/12\/img_510-2.png\" alt=\"IMG_510\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_510-2.png 391w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/12\/img_510-2-300x51.png 300w\" sizes=\"(max-width: 391px) 100vw, 391px\" \/><\/p>\n<p>Ch\u1ecdn D.<\/p>\n<p>Ch\u00fa \u00fd: t\u00edch ph\u00e2n kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o bi\u1ebfn s\u1ed1.<\/p>","protected":false},"excerpt":{"rendered":"<p>CH\u1ee6 \u0110\u1ec0 1. C\u00c1C B\u00c0I TO\u00c1N NGUY\u00caN H\u00c0M \u0110\u1ea7u ti\u00ean xin nh\u1eafc l\u1ea1i c\u00e1c kh\u00e1i ni\u1ec7m v\u00e0 \u0111\u1ecbnh l\u00ed c\u0103n b\u1ea3n \u0111\u1ec3 qu\u00fd b\u1ea1n \u0111\u1ecdc c\u00f3 ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng tr\u01b0\u1edbc khi \u0111i v\u00e0o c\u00e1c b\u00e0i to\u00e1n c\u1ee5 th\u1ec3. 1. \u0110\u1ecbnh ngh\u0129a Cho h\u00e0m s\u1ed1 x\u00e1c \u0111\u1ecbnh tr\u00ean t\u1eadp K (kho\u1ea3ng, n\u1eeda kho\u1ea3ng, \u0111o\u1ea1n c\u1ee7a [&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-22625","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\/22625","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=22625"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/22625\/revisions"}],"predecessor-version":[{"id":22783,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/22625\/revisions\/22783"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=22625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=22625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=22625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}