{"id":7680,"date":"2021-11-20T14:17:27","date_gmt":"2021-11-20T07:17:27","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7680"},"modified":"2021-11-20T17:13:30","modified_gmt":"2021-11-20T10:13:30","slug":"vao-nam-1859-nha-toan-hoc-anh-haminton-hamilton-da-cong-bo-mot-bai-toan-kha-li-thu-lam-nhieu-nguoi-da-phai-bo-nhieu-cong-suc-de-giai-no","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vao-nam-1859-nha-toan-hoc-anh-haminton-hamilton-da-cong-bo-mot-bai-toan-kha-li-thu-lam-nhieu-nguoi-da-phai-bo-nhieu-cong-suc-de-giai-no\/","title":{"rendered":"V\u00e0o n\u0103m 1859, nh\u00e0 to\u00e1n h\u1ecdc Anh Hamint\u01a1n (Hamilton) \u0111\u00e3 c\u00f4ng b\u1ed1 m\u1ed9t b\u00e0i to\u00e1n kh\u00e1 l\u00ed th\u00fa l\u00e0m nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e3 ph\u1ea3i b\u1ecf nhi\u1ec1u c\u00f4ng s\u1ee9c \u0111\u1ec3 gi\u1ea3i n\u00f3."},"content":{"rendered":"\n<p>B\u00e0i to\u00e1n nh\u01b0 sau: M\u1ed9t kh\u00e1ch du l\u1ecbch mu\u1ed1n \u0111i th\u0103m 20 th\u00e0nh ph\u1ed1 tr\u00ean th\u1ebf gi\u1edbi, m\u1ed7i th\u00e0nh ph\u1ed1 \u0111\u1ec1u c\u00f3 ba \u0111\u01b0\u1eddng \u0111i n\u1ed1i v\u1edbi th\u00e0nh ph\u1ed1 b\u00ean c\u1ea1nh. Kh\u00e1ch mu\u1ed1n \u0111i th\u0103m t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ed1 \u0111\u00e3 ch\u1ecdn, l\u1ea1i mu\u1ed1n v\u1edbi m\u1ed7i th\u00e0nh ph\u1ed1 ch\u1ec9 gh\u00e9 qua m\u1ed9t l\u1ea7n. Y\u00eau c\u1ea7u \u0111\u1eb7t ra l\u00e0 ch\u1ecdn \u0111i\u1ec3m xu\u1ea5t ph\u00e1t nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 sau khi \u0111i th\u0103m 20 th\u00e0nh ph\u1ed1 \u00f4ng ta l\u1ea1i quay v\u1ec1 \u0111\u01b0\u1ee3c \u0111i\u1ec3m xu\u1ea5t ph\u00e1t.<\/p>\n\n\n\n<p>V\u1eady ph\u1ea3i s\u1eafp x\u1ebfp chuy\u1ebfn du l\u1ecbch nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n<p>Ta s\u1ebd \u0111\u00fac k\u1ebft b\u00e0i to\u00e1n b\u1eb1ng c\u00e1ch v\u1ebd m\u1ed9t kh\u1ed1i l\u1eadp th\u1ec3 nh\u01b0 h\u00ecnh 1, trong h\u00ecnh c\u00f3 20 \u0111\u1ec9nh \u0111i\u1ec3m, m\u1ed7i \u0111\u1ec9nh \u0111\u1ea1i di\u1ec7n cho \u0111\u01b0\u1eddng \u0111i gi\u1eefa c\u00e1c th\u00e0nh ph\u1ed1 (m\u1ed7i \u0111\u1ec9nh c\u00f3 ba \u0111\u01b0\u1eddng). V\u1ea5n \u0111\u1ec1 c\u1ee7a ch\u00fang ta theo h\u00ecnh v\u1ebd x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed9t \u0111\u01b0\u1eddng g\u1ea5p kh\u00fac kh\u00e9p k\u00edn c\u00f3 th\u1ec3 ch\u1ea1y qua \u0111\u01b0\u1ee3c h\u1ebft c\u00e1c \u0111\u1ec9nh.<\/p>\n\n\n\n<p>Ch\u00fang ta t\u01b0\u1edfng t\u01b0\u1ee3ng nh\u01b0 kh\u1ed1i l\u1eadp th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng d\u00e2y cao su n\u1ed1i l\u1ea1i v\u1edbi nhau, nh\u1edd v\u1eady ta c\u00f3 th\u1ec3 tri\u1ec3n khai kh\u1ed1i l\u1eadp th\u1ec3 th\u00e0nh h\u00ecnh ph\u1eb3ng (h\u00ecnh 2) v\u00e0 ch\u00fang ta d\u1ec5 d\u00e0ng t\u00ecm th\u1ea5y con \u0111\u01b0\u1eddng ph\u1ea3i ch\u1ecdn (\u0111\u01b0\u1eddng n\u00e9t li\u1ec1n tr\u00ean h\u00ecnh 2). \u0110\u01b0\u01a1ng nhi\u00ean \u0111\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p, c\u00f2n c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u c\u00e1ch gi\u1ea3i kh\u00e1c.<\/p>\n\n\n\n<p>B\u00e0i to\u00e1n n\u00e0y ban \u0111\u1ea7u ch\u1ec9 l\u00e0 m\u1ed9t tr\u00f2 ch\u01a1i, m\u1ed9t b\u00e0i to\u00e1n vui, \u0111\u1ebfn th\u1ebf k\u1ec9 XX \u0111\u00e3 ph\u00e1t tri\u1ec3n th\u00e0nh n\u1ed9i dung ch\u1ee7 y\u1ebfu c\u1ee7a m\u1ed9t ng\u00e0nh to\u00e1n h\u1ecdc l\u00e0 \u201c\u0111\u1ed3 lu\u1eadn\u201d, m\u00e0 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i l\u1ea1i thu\u1ed9c m\u1ed9t ng\u00e0nh to\u00e1n h\u1ecdc kh\u00e1c \u201ct\u00f4p\u00f4 h\u1ecdc\u201d.<\/p>\n\n\n\n<p>T\u1eeb kho\u00e1: H\u00ecnh v\u1ebd Haminlton; B\u00e0i to\u00e1n Haminlt\u01a1n.<\/p>\n\n\n\n<p><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>B\u00e0i to\u00e1n nh\u01b0 sau: M\u1ed9t kh\u00e1ch du l\u1ecbch mu\u1ed1n \u0111i th\u0103m 20 th\u00e0nh ph\u1ed1 tr\u00ean th\u1ebf gi\u1edbi, m\u1ed7i th\u00e0nh ph\u1ed1 \u0111\u1ec1u c\u00f3 ba \u0111\u01b0\u1eddng \u0111i n\u1ed1i v\u1edbi th\u00e0nh ph\u1ed1 b\u00ean c\u1ea1nh. Kh\u00e1ch mu\u1ed1n \u0111i th\u0103m t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ed1 \u0111\u00e3 ch\u1ecdn, l\u1ea1i mu\u1ed1n v\u1edbi m\u1ed7i th\u00e0nh ph\u1ed1 ch\u1ec9 gh\u00e9 qua m\u1ed9t l\u1ea7n. Y\u00eau c\u1ea7u [&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-7680","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\/7680","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=7680"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7680\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}