{"id":18109,"date":"2024-02-26T05:37:33","date_gmt":"2024-02-26T05:37:33","guid":{"rendered":"https:\/\/soicau4046.minhngocxoso.com\/?p=18109"},"modified":"2024-02-26T05:37:33","modified_gmt":"2024-02-26T05:37:33","slug":"khai-niem-ve-cach-tinh-va-cach-danh-lo-xien","status":"publish","type":"post","link":"https:\/\/lochuanmb.com\/khai-niem-ve-cach-tinh-va-cach-danh-lo-xien\/","title":{"rendered":"kh\u00e1i ni\u1ec7m v\u1ec1 c\u00e1ch t\u00ednh v\u00e0 c\u00e1ch \u0111\u00e1nh l\u00f4 xi\u00ean"},"content":{"rendered":"

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Khi ch\u01a1i l\u00f4 \u0111\u1ec1 th\u00e0nh th\u1ea1o, ch\u00fang ta s\u1ebd b\u1eaft \u0111\u1ea7u \u0111\u1ebfn v\u1edbi nh\u1eefng k\u1ef9 thu\u1eadt m\u1edbi m\u1ebb h\u01a1n. Trong \u0111\u00f3, \u0111\u00e1nh c\u00e1c th\u1ec3 lo\u1ea1i l\u00f4 xi\u00ean l\u00e0 nh\u1eefng th\u1ee7 thu\u1eadt cao h\u01a1n m\u00e0 c\u00e1c \u0111\u1ec1 th\u1ee7 ph\u1ea3i th\u1ef1c hi\u1ec7n. Do \u0111\u00f3, trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd ch\u1ec9 b\u1ea1n c\u00e1ch \u0111\u00e1nh l\u00f4 xi\u00ean c\u00e1c th\u1ec3 lo\u1ea1i. T\u1ea5t nhi\u00ean l\u00e0 ch\u00fang t\u00f4i c\u00f2n k\u00e8m lu\u00f4n c\u1ea3 c\u00e1ch t\u00ednh l\u00f4 xi\u00ean cho c\u00e1c b\u1ea1n.<\/p>\n\n\n\n

Th\u00f4ng th\u01b0\u1eddng, ch\u00fang ta c\u00f3 l\u00f4 xi\u00ean 2, l\u00f4 xi\u00ean 3 v\u00e0 l\u00f4 xi\u00ean 4<\/strong> v\u1edbi \u0111\u1ed9 kh\u00f3 v\u00e0 x\u00e1c su\u1ea5t t\u0103ng d\u1ea7n<\/strong>. Tuy kh\u00f3 nh\u01b0ng n\u1ebfu bi\u1ebft c\u00e1ch t\u00ednh th\u00ec \u0103n l\u00f4 xi\u00ean h\u1eddi h\u01a1n c\u1ea3 \u0111\u00e1nh l\u00f4 b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n

L\u01b0u \u00fd l\u00e0 c\u00e1c c\u00e1ch \u0111\u00e1nh l\u00f4 xi\u00ean sau \u0111\u00e2y ch\u1ec9 n\u00ean d\u00f9ng \u1edf m\u1ee9c \u0111\u1ed9 tham kh\u1ea3o.<\/p>\n\n\n\n

Kh\u00e1i ni\u1ec7m v\u1ec1 c\u00e1ch t\u00ednh v\u00e0 c\u00e1ch \u0111\u00e1nh l\u00f4 xi\u00ean<\/strong><\/em><\/h2>\n\n\n\n

Kh\u00e1i ni\u1ec7m l\u00f4 xi\u00ean l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n

\u0110\u1ea7u ti\u00ean, ch\u00fang ta c\u1ea7n ph\u1ea3i hi\u1ec3u kh\u00e1i ni\u1ec7m v\u1ec1 l\u00f4 xi\u00ean (s\u1ed1 \u0111\u00e1) l\u00e0 g\u00ec? Tr\u01b0\u1edbc \u0111\u00f3, ch\u00fang t\u00f4i \u0111\u00e3 t\u1eebng gi\u1ea3i th\u00edch thu\u1eadt ng\u1eef l\u00f4 xi\u00ean m\u1ed9t l\u1ea7n trong b\u00e0i thu\u1eadt ng\u1eef l\u00f4 \u0111\u1ec1.<\/p>\n\n\n\n

Gi\u1ea3 s\u1eed \u0111\u00e1nh l\u00f4 th\u00ec ch\u00fang ta ch\u1ecdn \u0111\u00e1nh l\u1ebb m\u1ed9t c\u1eb7p s\u1ed1 ho\u1eb7c b\u1ed9 s\u1ed1 cho t\u1eebng ng\u00e0y. V\u00ed d\u1ee5 ch\u00fang t\u00f4i \u0111\u00e1nh con l\u00f4 24 cho ng\u00e0y th\u1ee9 nh\u1ea5t, con l\u00f4 42 cho ng\u00e0y th\u1ee9 2,\u2026<\/p>\n\n\n\n

V\u1ec1 c\u00e1ch \u0111\u00e1nh l\u00f4 xi\u00ean, l\u00fac n\u00e0y b\u1ea1n \u0111\u00e1nh theo c\u00e1c c\u1eb7p s\u1ed1 c\u00f3 d\u1ea1ng nh\u01b0 [s\u1ed1 1;s\u1ed1 2].<\/strong><\/p>\n\n\n\n

V\u00ed d\u1ee5:<\/strong> [24;42]<\/strong> v\u00e0 hai con n\u00e0y ph\u1ea3i C\u00d9NG V\u1ec0<\/strong> th\u00ec b\u1ea1n m\u1edbi th\u1eafng<\/strong>, xi\u00ean 3 v\u00e0 xi\u00ean 4 c\u0169ng t\u00ednh theo c\u00e1ch t\u01b0\u01a1ng t\u1ef1 v\u1edbi 3 con c\u00f9ng v\u1ec1 v\u00e0 4 con c\u00f9ng v\u1ec1.<\/p>\n\n\n\n

C\u00f3 m\u1ed9t s\u1ed1 n\u01a1i cho ph\u00e9p c\u00e1c b\u1ea1n \u0111\u00e1 2 \u0111\u00e0i v\u1edbi nhau (mi\u1ec1n Trung \u2013 Nam). V\u00e0 th\u01b0\u1eddng m\u1ecdi ng\u01b0\u1eddi s\u1ebd \u0111\u00e1nh \u0111\u1ea7u \u0111\u00edt xoay ng\u01b0\u1ee3c, ki\u1ec3u nh\u01b0 12-21.<\/p>\n\n\n\n

C\u00e1ch t\u00ednh \u0111\u1ec3 \u0111\u00e1nh l\u00f4 xi\u00ean<\/strong><\/h3>\n\n\n\n

H\u1eb1ng ng\u00e0y, l\u00f4 mi\u1ec1n b\u1eafc s\u1ebd x\u1ed5 27 gi\u1ea3i. Do v\u1eady, x\u00e1c su\u1ea5t khi b\u1ea1n ch\u1ecdn tr\u00fang 1 l\u00f4 xi\u00ean l\u00e0 23,76%<\/strong>. T\u1ea1i sao l\u1ea1i c\u00f3 k\u1ebft qu\u1ea3 nh\u01b0 th\u1ebf n\u00e0y?<\/p>\n\n\n\n

N\u1ebfu b\u1ea1n \u0111\u00e3 h\u1ecdc qua x\u00e1c xu\u1ea5t th\u1ed1ng k\u00ea th\u00ec t\u1ef7 l\u1ec7 tr\u00fang l\u00e0 100% t\u01b0\u01a1ng \u1ee9ng v\u1edbi 1<\/strong>, ngh\u0129a l\u00e0 m\u1ecdi s\u1ef1 tr\u00ean \u0111\u1eddi \u0111\u1ec1u quy v\u1ec1 x\u00e1c su\u1ea5t t\u1ed1i \u0111a l\u00e0 1 v\u00e0 l\u00fd t\u01b0\u1edfng nh\u1ea5t l\u00e0 1\/2 (0.5) \u0111\u1ed1i v\u1edbi c\u1edd b\u1ea1c.<\/strong><\/p>\n\n\n\n

Mu\u1ed1n t\u00ednh \u0111\u01b0\u1ee3c t\u1ef7 l\u1ec7 \u0103n th\u00ec ta ph\u1ea3i t\u00ednh t\u1ef7 l\u1ec7 tr\u01b0\u1ee3t l\u00f4 tr\u01b0\u1edbc<\/strong> (t\u1ef7 l\u1ec7 t\u1ea1ch l\u00f4) v\u00e0 d\u00f9ng 1 tr\u1eeb \u0111i t\u1ea1ch<\/strong> l\u00e0 ra tr\u00fang l\u00f4.<\/p>\n\n\n\n

T\u1ef7 l\u1ec7 t\u1ea1ch l\u00f4 \u0111\u01b0\u1ee3c t\u00ednh nh\u01b0 sau v\u1edbi c\u00e1c d\u1eef ki\u1ec7n:<\/h5>\n\n\n\n