{"id":7569,"date":"2021-11-20T14:03:49","date_gmt":"2021-11-20T07:03:49","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7569"},"modified":"2021-11-20T17:13:36","modified_gmt":"2021-11-20T10:13:36","slug":"neu-ban-muon-biet-ngay-nao-do-trong-lich-su-hoac-trong-tuong-lai-la-ngay-thu-may-neu-khong-dung-lich-ban-co-tinh-ra-duoc-khong","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/neu-ban-muon-biet-ngay-nao-do-trong-lich-su-hoac-trong-tuong-lai-la-ngay-thu-may-neu-khong-dung-lich-ban-co-tinh-ra-duoc-khong\/","title":{"rendered":"N\u1ebfu b\u1ea1n mu\u1ed1n bi\u1ebft ng\u00e0y n\u00e0o \u0111\u00f3 trong l\u1ecbch s\u1eed ho\u1eb7c trong t\u01b0\u01a1ng lai l\u00e0 ng\u00e0y th\u1ee9 m\u1ea5y, n\u1ebfu kh\u00f4ng d\u00f9ng l\u1ecbch, b\u1ea1n c\u00f3 t\u00ednh ra \u0111\u01b0\u1ee3c kh\u00f4ng?"},"content":{"rendered":"\n

Trong th\u1ef1c t\u1ebf c\u00f3 nhi\u1ec1u lo\u1ea1i c\u00f4ng th\u1ee9c d\u00f9ng \u0111\u1ec3 t\u00ednh to\u00e1n ng\u00e0y n\u00e0o, th\u00e1ng n\u00e0o c\u1ee7a m\u1ed9t n\u0103m n\u00e0o \u0111\u00f3 l\u00e0 ng\u00e0y th\u1ee9 m\u1ea5y?<\/p>\n\n\n\n

V\u00ed d\u1ee5:<\/p>\n\n\n\n

Trong \u0111\u00f3 x l\u00e0 n\u0103m d\u01b0\u01a1ng l\u1ecbch. C l\u00e0 s\u1ed1 ng\u00e0y t\u00ednh t\u1eeb ng\u00e0y 1 th\u00e1ng gi\u00eang n\u0103m \u0111\u00f3 \u0111\u1ebfn ng\u00e0y c\u1ea7n t\u00ednh (g\u1ed3m c\u1ea3 ng\u00e0y c\u1ea7n t\u00ednh trong \u0111\u00f3).<\/p>\n\n\n\n

C\u00e1c s\u1ed1 h\u1ea1ng l\u00e0 ph\u00e2n s\u1ed1 khi t\u00ednh xong ch\u1ec9 l\u1ea5y ph\u1ea7n nguy\u00ean. Sau khi t\u00ednh \u0111\u01b0\u1ee3c S, \u0111em S chia cho 7. N\u1ebfu s\u1ed1 d\u01b0 c\u1ee7a ph\u00e9p chia b\u1eb1ng 0, s\u1ed1 ng\u00e0y c\u1ea7n t\u00ednh l\u00e0 ng\u00e0y ch\u1ee7 nh\u1eadt, n\u1ebfu s\u1ed1 d\u01b0 l\u00e0 1 th\u00ec l\u00e0 ng\u00e0y th\u1ee9 hai v.v\u2026<\/p>\n\n\n\n

V\u00ed d\u1ee5 c\u1ea7n xem ng\u00e0y 1-7-1921 l\u00e0 ng\u00e0y th\u1ee9 m\u1ea5y?<\/p>\n\n\n\n

Ta t\u00ednh = 1920 + 480 – 19 + 4 + 182 = 2567<\/p>\n\n\n\n

Chia S cho 7 ta \u0111\u01b0\u1ee3c s\u1ed1 d\u01b0 l\u00e0 5. V\u1eady ng\u00e0y 1-7-1921 l\u00e0 ng\u00e0y th\u1ee9 s\u00e1u.<\/p>\n\n\n\n

C\u00f4ng th\u1ee9c tr\u00ean \u0111\u00e2y kh\u00f4ng \u0111\u01b0a ng\u00e0y, th\u00e1ng, tr\u1ef1c ti\u1ebfp v\u00e0o c\u00f4ng th\u1ee9c m\u00e0 ph\u1ea3i t\u00ednh ng\u00e0y c\u1ea7n t\u00ednh l\u00e0 ng\u00e0y th\u1ee9 m\u1ea5y trong n\u0103m. C\u00f4ng th\u1ee9c Taylor d\u01b0\u1edbi \u0111\u00e2y cho ph\u00e9p ta tr\u00e1nh \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3.<\/p>\n\n\n\n

Trong \u0111\u00f3 C l\u00e0 hai s\u1ed1 \u0111\u1ea7u c\u1ee7a n\u0103m d\u01b0\u01a1ng l\u1ecbch; y l\u00e0 hai s\u1ed1 sau c\u1ee7a n\u0103m d\u01b0\u01a1ng l\u1ecbch, m l\u00e0 s\u1ed1 th\u00e1ng, d l\u00e0 s\u1ed1 ng\u00e0y; \u0111i\u1ec1u c\u1ea7n ch\u00fa \u00fd l\u00e0 v\u1edbi th\u00e1ng 1 v\u00e0 th\u00e1ng 2 th\u00ec ng\u01b0\u1eddi ta xem l\u00e0 th\u00e1ng 13 v\u00e0 th\u00e1ng 14. Sau khi t\u00ednh \u0111\u01b0\u1ee3c W theo c\u00f4ng th\u1ee9c Taylor, \u0111em chia W cho 7, s\u1ed1 d\u01b0 cho ta ng\u00e0y th\u1ee9 m\u1ea5y nh\u01b0 \u1edf c\u00f4ng th\u1ee9c tr\u01b0\u1edbc.<\/p>\n\n\n\n

V\u00ed d\u1ee5: 1. Th\u1eed t\u00ednh ng\u00e0y 1-10-1949 l\u00e0 ng\u00e0y th\u1ee9 m\u1ea5y? Theo tr\u00ean ta c\u00f3 C = 19, y = 49, m = 10, d = 1<\/p>\n\n\n\n

D\u00f9ng c\u00f4ng th\u1ee9c Taylor ta c\u00f3: = 4- 38 +12 +28 = 55<\/p>\n\n\n\n

L\u1ea5y 55 chia cho 7 d\u01b0 6 n\u00ean ng\u00e0y 1-10-1949 l\u00e0 ng\u00e0y th\u1ee9 b\u1ea3y. 2. Ng\u00e0y 13-1-1999 l\u00e0 ng\u00e0y th\u1ee9 m\u1ea5y?<\/p>\n\n\n\n

C= 19, y = 99, m= 13, d = 13. \u1ee8ng d\u1ee5ng c\u00f4ng th\u1ee9c Taylor ta c\u00f3: = 4 – 38 + 99 + 24 + 36 +12 = 137 chia 137 cho 7 d\u01b0 4, v\u1eady ng\u00e0y 13-1-1999 l\u00e0 ng\u00e0y th\u1ee9 n\u0103m.<\/p>\n\n\n\n

T\u1eeb kho\u00e1: C\u00f4ng th\u1ee9c Taylor.<\/p>\n\n\n\n

<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"

Trong th\u1ef1c t\u1ebf c\u00f3 nhi\u1ec1u lo\u1ea1i c\u00f4ng th\u1ee9c d\u00f9ng \u0111\u1ec3 t\u00ednh to\u00e1n ng\u00e0y n\u00e0o, th\u00e1ng n\u00e0o c\u1ee7a m\u1ed9t n\u0103m n\u00e0o \u0111\u00f3 l\u00e0 ng\u00e0y th\u1ee9 m\u1ea5y? V\u00ed d\u1ee5: Trong \u0111\u00f3 x l\u00e0 n\u0103m d\u01b0\u01a1ng l\u1ecbch. C l\u00e0 s\u1ed1 ng\u00e0y t\u00ednh t\u1eeb ng\u00e0y 1 th\u00e1ng gi\u00eang n\u0103m \u0111\u00f3 \u0111\u1ebfn ng\u00e0y c\u1ea7n t\u00ednh (g\u1ed3m c\u1ea3 ng\u00e0y c\u1ea7n t\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-7569","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\/7569","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=7569"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7569\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}