{"id":17844,"date":"2024-04-26T02:54:03","date_gmt":"2024-04-26T02:54:03","guid":{"rendered":"https:\/\/soicau5108.minhngocxoso.com\/?p=17844"},"modified":"2024-04-26T02:54:03","modified_gmt":"2024-04-26T02:54:03","slug":"soi-cau-du-doan-lo-xien-2-mien-bac-mien-phi-chuan-xac-nhat","status":"publish","type":"post","link":"https:\/\/causongthu.com\/soi-cau-du-doan-lo-xien-2-mien-bac-mien-phi-chuan-xac-nhat\/","title":{"rendered":"soi c\u1ea7u d\u1ef1 \u0111o\u00e1n l\u00f4 xi\u00ean 2 mi\u1ec1n b\u1eafc mi\u1ec5n ph\u00ed, chu\u1ea9n x\u00e1c nh\u1ea5t"},"content":{"rendered":"
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Ch\u01a1i l\u00f4 l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u anh em l\u00f4 \u0111\u1ec1 th\u1ee7 s\u1eed d\u1ee5ng. C\u00e1ch \u0111\u00e1nh l\u00f4 truy\u1ec1n th\u1ed1ng s\u1ebd c\u00f3 th\u1ec3 t\u01b0\u01a1ng \u0111\u1ed1i d\u1ec5, tuy nhi\u00ean c\u00f3 m\u1ed9t h\u00ecnh th\u1ee9c bi\u1ebfn t\u1ea5u \u0111\u00f3 ch\u00ednh l\u00e0 \u0111\u00e1nh l\u00f4 xi\u00ean. Hi\u1ec7n nay, \u0111ang c\u00f3 3 lo\u1ea1i l\u00f4 xi\u00ean ch\u1ee7 y\u1ebfu, \u0111\u00f3 l\u00e0: l\u00f4 xi\u00ean 2, l\u00f4 xi\u00ean 3, l\u00f4 xi\u00ean 4. V\u1edbi c\u00e1ch ch\u01a1i kh\u00e1c nhau v\u00e0 \u0111\u1ed9 kh\u00f3 t\u0103ng d\u1ea7n khi ch\u01a1i, c\u00f9ng v\u1edbi \u0111\u00f3 th\u00ec x\u00e1c su\u1ea5t tr\u00fang th\u00ec gi\u1ea3m d\u1ea7n. Th\u1ebf nh\u01b0ng v\u1eabn c\u00f3 nhi\u1ec1u anh em v\u1eabn th\u00edch \u0111\u00e1nh l\u00f4 xi\u00ean h\u01a1n \u0111\u00e1nh l\u00f4 b\u00ecnh th\u01b0\u1eddng, v\u00ec n\u1ebfu b\u1ea1n bi\u1ebft t\u00ednh to\u00e1n khi tr\u00fang s\u1ebd l\u00e3i cao h\u01a1n r\u1ea5t l\u00e0 nhi\u1ec1u.<\/p>\n\n\n\n
L\u00f4 xi\u00ean 2 \u0111\u1eb9p nh\u1ea5t h\u00f4m nay l\u00e0 g\u00ec? Th\u00ec tr\u01b0\u1edbc h\u1ebft b\u1ea1n c\u1ea7n bi\u1ebft \u0111\u1ebfn kh\u00e1i ni\u1ec7m v\u1ec1 l\u00f4 xi\u00ean 2 c\u0169ng nh\u01b0 l\u00e0 t\u1ec9 l\u1ec7 tr\u00fang l\u00f4 xi\u00ean 2 l\u00e0 bao nhi\u00eau, t\u1eeb \u0111\u00f3 m\u1edbi t\u00ecm \u0111\u01b0\u1ee3c c\u00e1c c\u1eb7p l\u00f4 xi\u00ean 2 \u0111\u1eb9p chu\u1ea9n hay v\u1ec1 nh\u1ea5t v\u00e0 soi c\u1ea7u l\u00f4 xi\u00ean 2 x\u1ed5 s\u1ed1 mi\u1ec1n B\u1eafc chu\u1ea9n x\u00e1c nh\u1ea5t. M\u1eddi anh em tham kh\u1ea3o b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c nh\u1eefng kinh nghi\u1ec7m ch\u01a1i l\u00f4 xi\u00ean hi\u1ec7u qu\u1ea3 v\u00e0 mi\u1ec5n ph\u00ed nh\u00e9!<\/p>\n\n\n\n
L\u00f4 xi\u00ean l\u00e0 h\u00ecnh th\u1ee9c ch\u01a1i bi\u1ebfn t\u1ea5u c\u1ee7a \u0111\u00e1nh l\u00f4 b\u00ecnh th\u01b0\u1eddng, thay v\u00ec \u0111\u00e1nh m\u1ed9t s\u1ed1 ho\u1eb7c m\u1ed9t b\u1ed9 s\u1ed1 theo t\u1eebng ng\u00e0y th\u00ec ta \u0111\u00e1nh theo c\u00e1c c\u1eb7p s\u1ed1 nh\u01b0:<\/p>\n\n\n\n
L\u00f4 xi\u00ean 2: [S\u1ed1 1; s\u1ed1 2], v\u00ed d\u1ee5 [12;21]<\/p>\n\n\n\n
L\u00f4 xi\u00ean 3: [S\u1ed1 1; s\u1ed1 2; s\u1ed1 3], v\u00ed d\u1ee5 [12;21;31]<\/p>\n\n\n\n
L\u00f4 xi\u00ean 4: [S\u1ed1 1; s\u1ed1 2; s\u1ed1 3, s\u1ed1 4], v\u00ed d\u1ee5 [12;21;31;41]<\/p>\n\n\n\n
\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 t\u1ea5t c\u1ea3 2 hay 3 hay 4 s\u1ed1 b\u1ea1n ch\u1ecdn \u0111\u00e1nh c\u00f9ng nhau n\u00e0y \u0111\u1ec1u ph\u1ea3i c\u00f9ng v\u1ec1 trong m\u1ed9t ng\u00e0y th\u00ec m\u1edbi \u0111\u01b0\u1ee3c coi l\u00e0 th\u1eafng \u2013 \u0103n l\u00f4 xi\u00ean.<\/p>\n\n\n\n
M\u1ed7i ng\u00e0y, x\u1ed5 s\u1ed1 mi\u1ec1n B\u1eafc m\u1edf th\u01b0\u1edfng s\u1ed1 x\u1ed5 27 gi\u1ea3i, t\u01b0\u01a1ng \u1ee9ng s\u1ebd c\u00f3 27 con l\u00f4, s\u1ebd l\u00e0 27 con b\u1ea5t k\u1ef3 t\u00ednh t\u1eeb 00 \u0111\u1ebfn 99. Mu\u1ed1n t\u00ednh \u0111\u01b0\u1ee3c t\u1ec9 l\u1ec7 tr\u00fang 1 con l\u00f4 th\u00ec ph\u1ea3i t\u00ednh \u0111\u01b0\u1ee3c t\u1ec9 l\u1ec7 tr\u01b0\u1ee3t l\u00f4, c\u00f4ng th\u1ee9c nh\u01b0 sau:<\/p>\n\n\n\n
– T\u1ef7 l\u1ec7 tr\u01b0\u1ee3t 1 con l\u00f4 l\u00e0 99%<\/p>\n\n\n\n
– T\u1ef7 l\u1ec7 tr\u01b0\u1ee3t 2 con l\u00f4 l\u00e0 99%*99%<\/p>\n\n\n\n
– T\u1ef7 l\u1ec7 tr\u01b0\u1ee3t 3 con l\u00f4 l\u00e0 99%*99%*99%<\/p>\n\n\n\n
–> T\u1ec9 l\u1ec7 tr\u00fang m\u1ed9t con l\u00f4 s\u1ebd l\u00e0: [1 \u2013 (99% ^ 27)] * 100 ~ 23,7%<\/p>\n\n\n\n
–> T\u1ec9 l\u1ec7 tr\u00fang n con l\u00f4 s\u1ebd l\u00e0: [1 \u2013 [{100-n}% ^ 27)] * 100<\/p>\n\n\n\n
+ X\u00e1c su\u1ea5t tr\u00fang 1 con l\u00f4 l\u00e0 23,7%<\/p>\n\n\n\n
+ X\u00e1c su\u1ea5t tr\u01b0\u1ee3t 1 con l\u00f4 l\u00e0 99%<\/p>\n\n\n\n
+ X\u00e1c su\u1ea5t tr\u01b0\u1ee3t 2 con l\u00f4 l\u00e0 99% ^ 2 ~ 98%<\/p>\n\n\n\n
+ X\u00e1c su\u1ea5t tr\u01b0\u1ee3t 3 con l\u00f4 l\u00e0 99% ^ 3 ~ 97%<\/p>\n\n\n\n
Nh\u01b0 v\u1eady, t\u1ec9 l\u1ec7 tr\u01b0\u1ee3t l\u00f4 gi\u1ea3m t\u1eeb t\u1eeb, c\u1ee9 tr\u01b0\u1ee3t n con l\u00f4 th\u00ec s\u1ebd gi\u1ea3m n l\u1ea7n.<\/p>\n\n\n\n
C\u00f4ng th\u1ee9c t\u00ednh t\u1ec9 l\u1ec7 tr\u00fang l\u00f4 xi\u00ean 2 nh\u01b0 sau:<\/p>\n\n\n\n
– X\u00e1c su\u1ea5t kh\u00f4ng v\u1ec1 c\u1ea3 hai con c\u00f9ng l\u00fac: 98% ^ 27 ~ 57,9%<\/p>\n\n\n\n
– X\u00e1c su\u1ea5t ch\u1ec9 v\u1ec1 \u0111\u00fang 1 con: 2 x 76,2% x 23,7% ~ 36,1%.<\/p>\n\n\n\n
–> X\u00e1c su\u1ea5t kh\u00f4ng tr\u00fang l\u00f4 xi\u00ean 2: 57,9% + 36,1% ~ 94%<\/p>\n\n\n\n
–> T\u1ec9 l\u1ec7 tr\u00fang l\u00f4 xi\u00ean 2 s\u1ebd l\u00e0: 100% \u2013 94% ~ 6%. C\u00f3 th\u1ec3 th\u1ea5y \u0111\u00e2y l\u00e0 m\u1ed9t t\u1ec9 l\u1ec7 kh\u00f4ng l\u1edbn \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi mu\u1ed1n ch\u01a1i l\u00f4 xi\u00ean 2, tuy nhi\u00ean n\u1ebfu ng\u01b0\u1eddi ch\u01a1i bi\u1ebft c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1ea1i v\u1edbi nhau \u0111\u1ec3 l\u1ecdc ra nh\u1eefng c\u1eb7p s\u1ed1 c\u00f3 t\u1ea7n su\u1ea5t ra th\u1ea5p th\u00ec v\u1eabn c\u00f3 c\u01a1 h\u1ed9i \u0103n l\u00f4 xi\u00ean 2. Kinh nghi\u1ec7m l\u00e0 ch\u1ecdn nh\u1eefng c\u1eb7p l\u00f4 hay v\u1ec1 nh\u1ea5t gh\u00e9p th\u00e0nh xi\u00ean 2 \u0111\u1ec3 \u0111\u00e1nh th\u00ec s\u1ebd t\u0103ng kh\u1ea3 n\u0103ng tr\u00fang h\u01a1n.<\/p>\n\n\n\n