Ng\u01b0\u1eddi ta chia c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean l\u00e0m ba nh\u00f3m s\u1ed1: nh\u00f3m s\u1ed1 th\u1ee9 nh\u1ea5t thu\u1ed9c lo\u1ea1i s\u1ed1 nguy\u00ean t\u1ed1; lo\u1ea1i th\u1ee9 hai l\u00e0 nh\u00f3m c\u00e1c h\u1ee3p s\u1ed1; s\u1ed1 1 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 nguy\u00ean t\u1ed1 c\u0169ng kh\u00f4ng thu\u1ed9c lo\u1ea1i h\u1ee3p s\u1ed1. S\u1ed1 nguy\u00ean t\u1ed1 ch\u1ec9 c\u00f3 th\u1ec3 chia h\u1ebft cho s\u1ed1 1 v\u00e0 ch\u00ednh b\u1ea3n th\u00e2n s\u1ed1 \u0111\u00f3, c\u00f2n h\u1ee3p s\u1ed1 c\u00f3 th\u1ec3 chia h\u1ebft cho c\u00e1c s\u1ed1 kh\u00e1c. V\u00ed d\u1ee5 s\u1ed1 6 l\u00e0 m\u1ed9t h\u1ee3p s\u1ed1 v\u00ec ngo\u00e0i s\u1ed1 1 v\u00e0 b\u1ea3n th\u00e2n s\u1ed1 6, s\u1ed1 6 c\u00f2n c\u00f3 th\u1ec3 chia h\u1ebft cho 2 v\u00e0 3, v\u00ec v\u1eady vi\u1ec7c chia s\u1ed1 nguy\u00ean t\u1ed1 v\u00e0 h\u1ee3p s\u1ed1 th\u00e0nh hai nh\u00f3m ri\u00eang bi\u1ec7t l\u00e0 ho\u00e0n to\u00e0n h\u1ee3p l\u00ed. S\u1ed1 \u201c1\u201d ch\u1ec9 chia h\u1ebft cho 1 v\u00e0 b\u1ea3n th\u00e2n n\u00f3 (c\u0169ng l\u00e0 s\u1ed1 1), v\u1eady t\u1ea1i sao l\u1ea1i kh\u00f4ng gh\u00e9p n\u00f3 v\u00e0o nh\u00f3m s\u1ed1 nguy\u00ean t\u1ed1 ch\u1eb3ng ti\u1ec7n l\u1ee3i h\u01a1n hay sao, v\u00ec l\u00fac b\u1ea5y gi\u1edd c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean ch\u1ec9 c\u1ea7n chia th\u00e0nh hai nh\u00f3m s\u1ed1 l\u00e0 \u0111\u1ee7?<\/p>\n\n\n\n
\u0110\u1ec3 gi\u1ea3i \u0111\u00e1p c\u00e2u h\u1ecfi n\u00e0y, ta c\u1ea7n b\u1eaft \u0111\u1ea7u b\u00e0n v\u1ec1 s\u1ed1 nguy\u00ean t\u1ed1. V\u00ed d\u1ee5 ta c\u1ea7n xem x\u00e9t s\u1ed1 3003 c\u00f3 th\u1ec3 chia h\u1ebft cho nh\u1eefng s\u1ed1 n\u00e0o? Mu\u1ed1n tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi n\u00e0y ta c\u1ea7n ph\u1ea3i x\u00e9t t\u00ednh chia c\u1ee7a 3003 cho t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 t\u1eeb 1 cho \u0111\u1ebfn 3003 v\u00e0 vi\u1ec7c l\u00e0m \u0111\u00f3 c\u0169ng t\u1ed1n kh\u00e1 nhi\u1ec1u c\u00f4ng s\u1ee9c.<\/p>\n\n\n\n
Ch\u00fang ta bi\u1ebft r\u1eb1ng m\u1ecdi s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u1ec1u c\u00f3 th\u1ec3 bi\u1ec3u di\u1ec5n th\u00e0nh t\u00edch s\u1ed1 c\u1ee7a nhi\u1ec1u s\u1ed1 nguy\u00ean t\u1ed1. Hi\u1ec3n nhi\u00ean l\u00e0 m\u1ecdi s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u1ec1u c\u00f3 th\u1ec3 ph\u00e2n t\u00edch th\u00e0nh m\u1ed9t t\u00edch s\u1ed1 c\u1ee7a nhi\u1ec1u s\u1ed1 nguy\u00ean t\u1ed1 v\u00e0 h\u01a1n th\u1ebf n\u1eefa ph\u1ea3i l\u00e0 c\u00e1ch duy nh\u1ea5t. Ta h\u00e3y l\u1ea5y s\u1ed1 3003 l\u00e0m v\u00ed d\u1ee5, ta c\u00f3 th\u1ec3 th\u1ea5y: 3003 = 3 x 7 x 11 x 13.<\/p>\n\n\n\n
B\u00e2y gi\u1edd ta x\u00e9t v\u00ec sao kh\u00f4ng th\u1ec3 xem s\u1ed1 1 l\u00e0 s\u1ed1 nguy\u00ean t\u1ed1?<\/p>\n\n\n\n
N\u1ebfu xem \u201c1\u201d l\u00e0 s\u1ed1 nguy\u00ean t\u1ed1 th\u00ec khi ph\u00e2n t\u00edch m\u1ed9t s\u1ed1 ph\u1ee9c h\u1ee3p th\u00e0nh t\u00edch c\u1ee7a nhi\u1ec1u s\u1ed1 nguy\u00ean t\u1ed1, l\u00fac b\u1ea5y gi\u1edd s\u1ebd kh\u00f4ng c\u00f3 m\u1ed9t l\u1eddi gi\u1ea3i duy nh\u1ea5t n\u1eefa. V\u00ed nh\u01b0 v\u1edbi s\u1ed1 3003 ta c\u00f3 th\u1ec3 vi\u1ebft th\u00e0nh: 3003 = 3 x 7 x 11 x 13 3003 = 1 x 3 x 7 x 11 x 13 3003 = 1 x 1 x 3 x 7 x 11 x 13 ngh\u0129a l\u00e0 ta c\u00f3 th\u1ec3 th\u00eam t\u00edch s\u1ed1 tu\u1ef3 \u00fd s\u1ed1 con s\u1ed1 1 v\u00e0 nh\u01b0 v\u1eady vi\u1ec7c bi\u1ec3u di\u1ec5n 3003 th\u00e0nh t\u00edch c\u1ee7a c\u00e1c s\u1ed1 nguy\u00ean t\u1ed1 \u0111\u00e3 kh\u00f4ng ph\u1ea3i l\u00e0 duy nh\u1ea5t v\u00e0 tr\u1edf th\u00e0nh c\u00f3 th\u1ec3 ph\u00e2n t\u00edch m\u1ed9t s\u1ed1 th\u00e0nh t\u00edch c\u1ee7a c\u00e1c s\u1ed1 nguy\u00ean t\u1ed1 theo nhi\u1ec1u c\u00e1ch v\u00e0 \u0111\u00f3 s\u1ebd l\u00e0 m\u1ed9t phi\u1ec1n ph\u1ee9c l\u1edbn, v\u00ec v\u1eady kh\u00f4ng th\u1ec3 xem 1 l\u00e0 m\u1ed9t s\u1ed1 nguy\u00ean t\u1ed1.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: S\u1ed1 nguy\u00ean t\u1ed1 v\u00e0 h\u1ee3p s\u1ed1.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ng\u01b0\u1eddi ta chia c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean l\u00e0m ba nh\u00f3m s\u1ed1: nh\u00f3m s\u1ed1 th\u1ee9 nh\u1ea5t thu\u1ed9c lo\u1ea1i s\u1ed1 nguy\u00ean t\u1ed1; lo\u1ea1i th\u1ee9 hai l\u00e0 nh\u00f3m c\u00e1c h\u1ee3p s\u1ed1; s\u1ed1 1 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 nguy\u00ean t\u1ed1 c\u0169ng kh\u00f4ng thu\u1ed9c lo\u1ea1i h\u1ee3p s\u1ed1. S\u1ed1 nguy\u00ean t\u1ed1 ch\u1ec9 c\u00f3 th\u1ec3 chia h\u1ebft cho s\u1ed1 1 v\u00e0 ch\u00ednh […]<\/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-7505","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\/7505","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=7505"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7505\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7505"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7505"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7505"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}