{"id":7461,"date":"2021-11-20T13:36:19","date_gmt":"2021-11-20T06:36:19","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7461"},"modified":"2021-11-20T15:09:09","modified_gmt":"2021-11-20T08:09:09","slug":"chung-ta-da-biet-trong-cac-phep-toan-o-bac-tieu-hoc-nguoi-ta-goi-mot-so-chia-het-cho-2-la-so-chan-mot-so-khong-chia-het-cho-2-la-so-le-the-thi-so-0-la-so-chan-hay-so-le-khi-ta-noi-den-so-chan-hay-s","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/chung-ta-da-biet-trong-cac-phep-toan-o-bac-tieu-hoc-nguoi-ta-goi-mot-so-chia-het-cho-2-la-so-chan-mot-so-khong-chia-het-cho-2-la-so-le-the-thi-so-0-la-so-chan-hay-so-le-khi-ta-noi-den-so-chan-hay-s\/","title":{"rendered":"S\u1ed1 0 l\u00e0 s\u1ed1 ch\u1eb5n hay s\u1ed1 l\u1ebb?"},"content":{"rendered":"\n<p>Ch\u00fang ta \u0111\u00e3 bi\u1ebft trong c\u00e1c ph\u00e9p to\u00e1n \u1edf b\u1eadc ti\u1ec3u h\u1ecdc ng\u01b0\u1eddi ta g\u1ecdi m\u1ed9t s\u1ed1 chia h\u1ebft cho 2 l\u00e0 s\u1ed1 ch\u1eb5n, m\u1ed9t s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 l\u00e0 s\u1ed1 l\u1ebb. Th\u1ebf th\u00ec s\u1ed1 0 l\u00e0 s\u1ed1 ch\u1eb5n hay s\u1ed1 l\u1ebb? Khi ta n\u00f3i \u0111\u1ebfn s\u1ed1 ch\u1eb5n hay s\u1ed1 l\u1ebb n\u00f3i chung l\u00e0 \u0111\u1ec3 d\u00e0nh cho c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean. S\u1ed1 0 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 t\u1ef1 nhi\u00ean n\u00ean t\u1ea1m th\u1eddi kh\u00f4ng b\u00e0n \u0111\u1ebfn. Th\u1ebf nh\u01b0ng c\u00f3 th\u1ec3 nghi\u00ean c\u1ee9u v\u1ea5n \u0111\u1ec1 n\u00e0y kh\u00f4ng?<\/p>\n\n\n\n<p>C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 kh\u00f4ng ch\u1ec9 c\u00f3 th\u1ec3 nghi\u00ean c\u1ee9u m\u00e0 c\u1ea7n ph\u1ea3i nghi\u00ean c\u1ee9u. Kh\u00f4ng nh\u1eefng c\u1ea7n nghi\u00ean c\u1ee9u s\u1ed1 0 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 t\u1ef1 nhi\u00ean duy nh\u1ea5t \u0111\u00e3 h\u1ecdc trong thu\u1eadt to\u00e1n m\u00e0 sau khi h\u1ecdc \u0111\u1ea1i s\u1ed1 \u1edf b\u1eadc trung h\u1ecdc c\u00f2n ph\u1ea3i m\u1edf r\u1ed9ng kh\u00e1i ni\u1ec7m s\u1ed1 ch\u1eb5n &#8211; l\u1ebb \u0111\u1ebfn ph\u1ea1m vi c\u00e1c s\u1ed1 \u00e2m.<\/p>\n\n\n\n<p>Ti\u00eau chu\u1ea9n xem x\u00e9t c\u0169ng kh\u00e1 \u0111\u01a1n gi\u1ea3n: Ph\u00e0m c\u00e1c s\u1ed1 chia h\u1ebft \u0111\u01b0\u1ee3c cho 2 l\u00e0 s\u1ed1 ch\u1eb5n, s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 l\u00e0 s\u1ed1 l\u1ebb.<\/p>\n\n\n\n<p>C\u1ea7n nh\u1ea5n m\u1ea1nh kh\u00e1i ni\u1ec7m chia h\u1ebft khi th\u01b0\u01a1ng s\u1ed1 l\u00e0 s\u1ed1 nguy\u00ean m\u00e0 ph\u00e9p chia kh\u00f4ng c\u00f3 s\u1ed1 d\u01b0. Hi\u1ec3n nhi\u00ean 0 : 2 = 0, th\u01b0\u01a1ng s\u1ed1 0 thu \u0111\u01b0\u1ee3c l\u00e0 s\u1ed1 nguy\u00ean n\u00ean s\u1ed1 kh\u00f4ng l\u00e0 s\u1ed1 ch\u1eb5n. T\u01b0\u01a1ng t\u1ef1, c\u00e1c s\u1ed1: -2, -4, -6, -8, -10, -360, -2578,\u2026l\u00e0 c\u00e1c s\u1ed1 ch\u1eb5n, c\u00f2n c\u00e1c s\u1ed1 -1, -3, -5, -7, -249,-1683 v.v\u2026l\u00e0 c\u00e1c s\u1ed1 l\u1ebb.<\/p>\n\n\n\n<p>T\u1eeb kho\u00e1: S\u1ed1 0 l\u00e0 s\u1ed1 ch\u1eb5n hay s\u1ed1 l\u1ebb.<\/p>\n\n\n\n<p><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ch\u00fang ta \u0111\u00e3 bi\u1ebft trong c\u00e1c ph\u00e9p to\u00e1n \u1edf b\u1eadc ti\u1ec3u h\u1ecdc ng\u01b0\u1eddi ta g\u1ecdi m\u1ed9t s\u1ed1 chia h\u1ebft cho 2 l\u00e0 s\u1ed1 ch\u1eb5n, m\u1ed9t s\u1ed1 kh\u00f4ng chia h\u1ebft cho 2 l\u00e0 s\u1ed1 l\u1ebb. Th\u1ebf th\u00ec s\u1ed1 0 l\u00e0 s\u1ed1 ch\u1eb5n hay s\u1ed1 l\u1ebb? Khi ta n\u00f3i \u0111\u1ebfn s\u1ed1 ch\u1eb5n hay s\u1ed1 l\u1ebb n\u00f3i chung [&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":[15,9],"tags":[],"class_list":["post-7461","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7461","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=7461"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7461\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7461"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7461"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7461"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}