{"id":7579,"date":"2021-11-20T14:05:02","date_gmt":"2021-11-20T07:05:02","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7579"},"modified":"2021-11-20T17:13:35","modified_gmt":"2021-11-20T10:13:35","slug":"the-nao-la-bai-toan-3x-1","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/the-nao-la-bai-toan-3x-1\/","title":{"rendered":"Th\u1ebf n\u00e0o l\u00e0 b\u00e0i to\u00e1n 3x + 1?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">B\u1ea1n tu\u1ef3 ch\u1ecdn m\u1ed9t s\u1ed1 x l\u00e0 s\u1ed1 t\u1ef1 nhi\u00ean b\u1ea5t k\u00ec, \u1ee9ng d\u1ee5ng t\u00ednh ch\u1ea5t c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 t\u1ea1o n\u00ean m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean y m\u1edbi, theo ph\u01b0\u01a1ng ph\u00e1p sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong s\u1ed1 h\u1ecdc, t\u1eeb m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean ch\u1ecdn tu\u1ef3 \u00fd, theo m\u1ed9t quy t\u1eafc nh\u1ea5t \u0111\u1ecbnh t\u1ea1o \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean kh\u00e1c (s\u1ed1 m\u1edbi n\u00e0y c\u00f3 th\u1ec3 b\u1eb1ng s\u1ed1 ban \u0111\u1ea7u ho\u1eb7c kh\u00f4ng b\u1eb1ng s\u1ed1 ban \u0111\u1ea7u), ng\u01b0\u1eddi ta g\u1ecdi \u0111\u00f3 l\u00e0 ph\u00e9p bi\u1ebfn \u0111\u1ed5i. V\u00ed d\u1ee5 d\u1ef1a v\u00e0o quy t\u1eafc bi\u1ebfn \u0111\u1ed5i c\u00f3 th\u1ec3 bi\u1ebfn s\u1ed1 18 th\u00e0nh 9,9 ho\u1eb7c b\u1eb1ng 28 v.v\u2026V\u1ea5n \u0111\u1ec1 l\u00e0 xu\u1ea5t ph\u00e1t t\u1eeb m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean, bi\u1ebfn \u0111\u1ed5i li\u00ean t\u1ee5c ta s\u1ebd thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 nh\u01b0 th\u1ebf n\u00e0o? \u0110\u00f3 l\u00e0 c\u00e2u h\u1ecfi kh\u00e1 l\u00ed th\u00fa h\u1ebft s\u1ee9c h\u1ea5p d\u1eabn c\u1ee7a tr\u00f2 ch\u01a1i to\u00e1n h\u1ecdc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y ta l\u1ea5y s\u1ed1 t\u1ef1 nhi\u00ean 18 l\u00e0m v\u00ed d\u1ee5. Ta th\u1eed xem ph\u00e9p bi\u1ebfn \u0111\u1ed5i li\u00ean t\u1ee5c s\u1ebd nh\u01b0 th\u1ebf n\u00e0o? Nh\u01b0 th\u1ec3 hi\u1ec7n \u1edf h\u00ecnh 1 cu\u1ed1i c\u00f9ng xu\u1ea5t hi\u1ec7n v\u00f2ng tu\u1ea7n ho\u00e0n 4214. Tr\u00ean h\u00ecnh 2 th\u1ec3 hi\u1ec7n ph\u00e9p bi\u1ebfn \u0111\u1ed5i c\u1ee7a m\u1ed9t s\u1ed1 l\u1ebb, s\u1ed1 21 cu\u1ed1i c\u00f9ng c\u0169ng xu\u1ea5t hi\u1ec7n v\u00f2ng tu\u1ea7n ho\u00e0n t\u01b0\u01a1ng t\u1ef1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ban \u0111\u1ea7u ch\u1ec9 thu\u1ea7n tu\u00fd l\u00e0 m\u1ed9t tr\u00f2 ch\u01a1i s\u1ed1 h\u1ecdc, l\u01b0u h\u00e0nh \u1edf \u0111\u1ecba ph\u01b0\u01a1ng n\u00e0o \u0111\u00f3 c\u1ee7a n\u01b0\u1edbc M\u1ef9. Ng\u00e0y nay tr\u00f2 ch\u01a1i \u0111\u00e3 ph\u1ed5 bi\u1ebfn r\u1ed9ng r\u00e3i sang Ch\u00e2u \u00c2u, sau \u0111\u00f3 theo ng\u01b0\u1eddi Nh\u1eadt m\u00e0 l\u01b0u truy\u1ec1n sang Ch\u00e2u \u00e1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n t\u1ea1i tr\u00f2 ch\u01a1i \u0111\u00e3 l\u01b0u truy\u1ec1n r\u1ed9ng r\u00e3i \u1edf nhi\u1ec1u n\u01b0\u1edbc tr\u00ean th\u1ebf gi\u1edbi. Th\u1eadm ch\u00ed ng\u00e0y nay ng\u01b0\u1eddi ta \u0111\u00e3 d\u00f9ng m\u00e1y t\u00ednh \u0111i\u1ec7n t\u1eed \u0111\u1ec3 xem x\u00e9t c\u00e1c bi\u1ebfn \u0111\u1ed5i c\u00e1c s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 7 x 1011 k\u1ebft qu\u1ea3 c\u0169ng \u0111\u1ec1u nh\u1eadn \u0111\u01b0\u1ee3c v\u00f2ng 4214. \u0110\u00f3 ch\u00ednh l\u00e0 b\u00e0i to\u00e1n 3x + 1 hay c\u00f2n g\u1ecdi l\u00e0 v\u1ea5n \u0111\u1ec1 Kolaxi\u2026Th\u1ebf nh\u01b0ng k\u1ebft lu\u1eadn c\u00f2n ch\u01b0a c\u00f3 c\u00e1ch ch\u1ee9ng minh v\u00e0 c\u00f2n b\u00f3 h\u1eb9p trong ph\u1ea1m vi s\u1ed1 t\u1ef1 nhi\u00ean.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb kho\u00e1: B\u00e0i to\u00e1n 3x +1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n tu\u1ef3 ch\u1ecdn m\u1ed9t s\u1ed1 x l\u00e0 s\u1ed1 t\u1ef1 nhi\u00ean b\u1ea5t k\u00ec, \u1ee9ng d\u1ee5ng t\u00ednh ch\u1ea5t c\u1ee7a s\u1ed1 t\u1ef1 nhi\u00ean, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 t\u1ea1o n\u00ean m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean y m\u1edbi, theo ph\u01b0\u01a1ng ph\u00e1p sau: Trong s\u1ed1 h\u1ecdc, t\u1eeb m\u1ed9t s\u1ed1 t\u1ef1 nhi\u00ean ch\u1ecdn tu\u1ef3 \u00fd, theo m\u1ed9t quy t\u1eafc nh\u1ea5t \u0111\u1ecbnh t\u1ea1o \u0111\u01b0\u1ee3c [&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-7579","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\/7579","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=7579"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7579\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}