{"id":1,"count":10,"description":"\r\n\r\nMeta: Nhi\u1ec1u ng\u01b0\u1eddi v\u1eabn ch\u01b0a hi\u1ec3u soi c\u1ea7u mi\u1ec1n b\u1eafc l\u00e0 g\u00ec? L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 soi c\u1ea7u mb si\u00eau chu\u1ea9n<\/strong>? Nh\u1eefng th\u1eafc m\u1eafc tr\u00ean s\u1ebd \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i gi\u1ea3i \u0111\u00e1p ngay sau \u0111\u00e2y.\r\n

\u00bb<\/span> ch\u1ed1t \u0111\u1ed9c th\u1ee7 \u0111\u1ec1 mi\u1ec5n ph\u00ed<\/a><\/span>\u00a0\u00ab<\/span><\/strong><\/p>\r\n\r\n\r\n\r\n

Gi\u1ea3i \u0111\u00e1p m\u1ed9t s\u1ed1 th\u1eafc m\u1eafc v\u1ec1 h\u00ecnh th\u1ee9c soi c\u1ea7u mb si\u00eau chu\u1ea9n<\/h2>\r\n\r\n\r\n\r\n\r\n\u0110\u1ed1i v\u1edbi nh\u1eefng cao th\u1ee7 l\u00f4 \u0111\u1ec1 th\u00ec h\u00ecnh th\u1ee9c soi c\u1ea7u mb si\u00eau chu\u1ea9n <\/strong><\/a><\/span>l\u00e0 vi\u1ec7c qu\u00e1 \u0111\u01a1n gi\u1ea3n. \u0110\u00f3 l\u00e0 \u201ccao th\u1ee7\u201d n\u00f3i ri\u00eang, c\u00f2n nh\u00ecn chung v\u1edbi t\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng\u00a0 ng\u01b0\u1eddi m\u1edbi ch\u1eadp ch\u1eefng tham gia soi c\u1ea7u th\u00ec vi\u1ec7c soi c\u1ea7u mb si\u00eau chu\u1ea9n<\/strong> l\u00e0 c\u1ea3 m\u1ed9t v\u1ea5n \u0111\u1ec1. N\u1ebfu b\u1ea1n c\u00f3 \u00fd ch\u00ed mu\u1ed1n ch\u01a1i gi\u1ecfi ch\u01a1i hay, h\u00e3y tham kh\u1ea3o b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y. Ch\u00fang t\u00f4i s\u1ebd gi\u00fap b\u1ea1n tr\u1edf th\u00e0nh cao th\u1ee7 soi c\u1ea7u chu\u1ea9n nh\u1ea5t.\r\n\r\n\r\n\r\n\r\n

Soi c\u1ea7u mb l\u00e0 g\u00ec?<\/h2>\r\n\r\n\r\n\r\n\r\nSoi c\u1ea7u mb l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c d\u1ef1a v\u00e0o k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 mb \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 tr\u01b0\u1edbc \u0111\u00f3, r\u1ed3i t\u00ecm ra m\u1ed9t con l\u00f4 hay con \u0111\u1ec1 m\u00e0 b\u1ea1n cho l\u00e0 s\u1ebd mang l\u1ea1i may m\u1eafn cho m\u00ecnh, sau \u0111\u00f3 ch\u1ed1t \u0111\u1ec3 \u0111\u00e1nh cho ng\u00e0y h\u00f4m sau.\r\n\r\n\r\n\r\n\r\n
\"Soi<\/figure>\r\n\r\n\r\n\r\n\r\nSoi c\u1ea7u mi\u1ec1n b\u1eafc l\u00e0 g\u00ec?\u00a0<\/em>\r\n\r\n\r\n\r\n\r\n\r\nD\u1ec5 hi\u1ec3u h\u01a1n v\u1ec1 soi c\u1ea7u mi\u1ec1n b\u1eafc \u0111\u00f3 l\u00e0 ch\u00fang ta s\u1ebd ph\u1ea3i theo d\u00f5i k\u1ebft qu\u1ea3 x\u1ed5 s\u1ed1 trong nhi\u1ec1u ng\u00e0y li\u1ec1n, k\u1ebft h\u1ee3p nh\u1eefng v\u1ecb tr\u00ed tr\u00ean b\u1ea3ng k\u1ebft qu\u1ea3, khi \u0111\u00f3 m\u1edbi t\u00ecm ra \u0111\u01b0\u1ee3c \u0111\u1eb7c \u0111i\u1ec3m c\u0169ng nh\u01b0 nh\u1eefng m\u1ed1i li\u00ean h\u1ec7 chung t\u1eeb nh\u1eefng k\u1ebft qu\u1ea3 \u0111\u00f3. \u0110\u00f3 ng\u01b0\u1eddi ta g\u1ecdi l\u00e0 \u201c c\u1ea7u\u201d. Nh\u01b0 v\u1eady,\u00a0 soi c\u1ea7u l\u00f4 s\u1ebd \u0111\u01b0\u1ee3c hi\u1ec3u l\u00e0 quan s\u00e1t di\u1ec5n bi\u1ebfn, t\u00ednh to\u00e1n, ph\u00e1n \u0111o\u00e1n r\u1ed3i cho ra con l\u00f4 \u0111\u1ec1 \u0111\u1eb9p nh\u1ea5t.\r\n\r\n\r\n\r\n\r\n

S\u1ed1 v\u1ecb tr\u00ed khi soi c\u1ea7u mb<\/h2>\r\n\r\n\r\n\r\n\r\nAnh em c\u1ea7n ph\u1ea3i bi\u1ebft c\u00f3 bao nhi\u00eau v\u1ecb tr\u00ed trong b\u1ea3ng k\u1ebft qu\u1ea3 khi soi c\u1ea7u mi\u1ec1n b\u1eafc. \u1ede b\u1ea3ng k\u1ebft qu\u1ea3 gi\u1ea3i \u0110B c\u1ee7a 1, 2, 3 s\u1ebd c\u00f3 5 con s\u1ed1. V\u1eady th\u00ec 10 gi\u1ea3i s\u1ebd c\u00f3 t\u1ed5ng 50 s\u1ed1.\r\n\r\n\r\n\r\n\r\n\r\nTrong \u0111\u00f3, 40 s\u1ed1 s\u1ebd g\u1ed3m gi\u1ea3i t\u01b0, s\u00e1u gi\u1ea3i 5, m\u1ed7i gi\u1ea3i s\u1ebd c\u00f3 4 s\u1ed1, 3 gi\u1ea3i s\u00e1u, v\u1eady s\u1ebd c\u00f3 9 s\u1ed1. Gi\u1ea3i 7 s\u1ebd c\u00f3 b\u1ed1n gi\u1ea3i. M\u1ed7i gi\u1ea3i s\u1ebd c\u00f3 2 s\u1ed1, v\u1eady t\u1ed5ng l\u00e0 8 s\u1ed1.\r\n\r\n\r\n\r\n\r\n\r\nNh\u01b0 v\u1eady, ta s\u1ebd c\u00f3 t\u1ea5t c\u1ea3 l\u00e0 : 50+40+9+8= 107 con s\u1ed1 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 107 v\u1ecb tr\u00ed kh\u00e1c nhau.\r\n\r\n\r\n\r\n\r\n\r\nM\u1ed7i v\u1ecb tr\u00ed nh\u01b0 v\u1eady s\u1ebd gh\u00e9p \u0111\u01b0\u1ee3c v\u1edbi 106 v\u1ecb tr\u00ed c\u00f2n l\u1ea1i. T\u1eeb \u0111\u00f3, s\u1ebd h\u00ecnh th\u00e0nh ra 106 c\u1ea7u l\u00f4 kh\u00e1c nhau. V\u1eady, t\u1ed5ng s\u1ed1 c\u1ea7u l\u00f4 \u0111\u01b0\u1ee3c gh\u00e9p t\u1eeb 2 v\u1ecb tr\u00ed kh\u00e1c nhau s\u1ebd l\u00e0 [(107!)\/(107-2)! x 2!]\u00a0 ta \u0111\u01b0\u1ee3c\u00a0 5671. \u0110\u1ec3 bi\u1ebft c\u1ea7u n\u00e0o th\u01b0\u1eddng hay xu\u1ea5t hi\u1ec7n th\u00ec ta c\u1ea7n ph\u1ea3i quan s\u00e1t m\u1ed7i ng\u00e0y.\r\n\r\n\r\n\r\n\r\n\r\nNgo\u00e0i v\u1ecb tr\u00ed \u0111\u01b0\u1ee3c gh\u00e9p v\u1edbi v\u1ecb tr\u00ed kh\u00e1c, th\u00ec n\u00f3 c\u0169ng \u0111\u01b0\u1ee3c gh\u00e9p v\u1edbi ch\u00ednh n\u00f3. T\u1eeb \u0111\u00f3 h\u00ecnh th\u00e0nh ra c\u1eb7p s\u1ed1 k\u00e9p. V\u1eady l\u00e0 ch\u00fang ta c\u00f3 \u0111\u01b0\u1ee3c 107 c\u1ea7u l\u00f4 k\u00e9p n\u1eefa.\r\n\r\n\r\n\r\n\r\n\r\nNgo\u00e0i ra, ch\u00fang ta c\u00f3 th\u1ec3 gh\u00e9p c\u00e1c v\u1ecb tr\u00ed t\u1eeb b\u1ea3ng k\u1ebft qu\u1ea3 v\u1edbi c\u00e1c s\u1ed1 th\u1ee9 t\u1ef1 t\u1eeb 0 \u0111\u1ebfn 9 s\u1ebd \u0111\u01b0\u1ee3c 107 nh\u00e2n 10 b\u1eb1ng 1070. \u00c1p d\u1ee5ng c\u00e1ch gh\u00e9p n\u00e0y c\u0169ng cho ra nhi\u1ec1u c\u1ea7u l\u00f4 r\u1ea5t t\u1ed1t.\r\n\r\n\r\n\r\n\r\n

L\u1ee3i \u00edch soi c\u1ea7u mi\u1ec1n b\u1eafc mang l\u1ea1i<\/h2>\r\n\r\n\r\n\r\n\r\n\u0110\u1ed1i v\u1edbi nh\u1eefng c\u00e1ch ch\u01a1i kh\u00e1c th\u00ec soi c\u1ea7u mi\u1ec1n b\u1eafc c\u0169ng mang l\u1ea1i l\u1ee3i \u00edch cho ng\u01b0\u1eddi ch\u01a1i nh\u01b0 sau:\r\n\r\n\r\n\r\n\r\n
\"c\u00e1ch<\/figure>\r\n\r\n\r\n\r\n\r\nCh\u1ecdn c\u00e1ch ch\u01a1i soi c\u1ea7u ph\u00f9 h\u1ee3p nh\u1ea5t<\/em>\r\n

\u00bb<\/span> ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh d\u00e0n l\u00f4 mb c\u00f3 l\u00e3i<\/a><\/span>\u00a0\u00ab<\/span><\/strong><\/p>\r\n\r\n\r\n\r\n