{"id":2713,"date":"2021-10-14T21:25:22","date_gmt":"2021-10-14T14:25:22","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=2713"},"modified":"2021-10-14T22:10:20","modified_gmt":"2021-10-14T15:10:20","slug":"tinh-chat-cua-phep-nhan-tong-hop-ly-thuyet-de-hieu-nhat","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tinh-chat-cua-phep-nhan-tong-hop-ly-thuyet-de-hieu-nhat\/","title":{"rendered":"T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n \u2013 T\u1ed5ng h\u1ee3p l\u00fd thuy\u1ebft d\u1ec5 hi\u1ec3u nh\u1ea5t"},"content":{"rendered":"\n<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p>T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n l\u00e0 b\u00e0i t\u1ed5ng h\u1ee3p, gi\u00fap n\u00e2ng cao ki\u1ebfn th\u1ee9c \u0111\u1ea1i s\u1ed1. \u0110\u1ed3ng th\u1eddi l\u00e0m phong ph\u00fa th\u00eam nh\u1eefng d\u1ea1ng to\u00e1n v\u1edbi t\u00edch. \u0110\u00f3 l\u00e0 nh\u1eefng b\u00e0i c\u01a1 b\u1ea3n c\u00e1c em <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc tr\u01b0\u1edbc \u0111\u00e2y. H\u00f4m nay, h\u00e3y t\u1ed5ng h\u1ee3p l\u00fd thuy\u1ebft t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n. \u0110\u1ed3ng th\u1eddi h\u01b0\u1edbng d\u1eabn c\u00e1c em <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> gi\u1ea3i c\u00e1c b\u00e0i t\u1eadp trong s\u00e1ch gi\u00e1o khoa to\u00e1n l\u1edbp 6 nh\u00e9!<\/p>\n\n\n\n<p>T\u1ed5ng h\u1ee3p l\u00fd thuy\u1ebft t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>\u1ede hai b\u00e0i tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 t\u00ecm hi\u1ec3u v\u1ec1 Nh\u00e2n hai s\u1ed1 nguy\u00ean c\u00f9ng d\u1ea5u v\u00e0 Nh\u00e2n hai s\u1ed1 nguy\u00ean kh\u00e1c d\u1ea5u. Trong nh\u1eefng b\u00e0i ti\u1ebfp theo \u0111\u00e2y, \u0111\u1ec3 m\u1edf r\u1ed9ng th\u00eam v\u1ec1 d\u1ea1ng to\u00e1n. \u0110\u1ed3ng th\u1eddi c\u0169ng \u0111\u1ec3 n\u00e2ng cao \u0111\u1ed9 kh\u00f3 cho c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp. <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">Ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n<\/a> h\u1ecdc l\u1edbp 6 ti\u1ebfp t\u1ee5c v\u1edbi b\u00e0i t\u1ed5ng h\u1ee3p t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n.<\/p>\n\n\n\n<p>Trong ph\u00e9p nh\u00e2n, x\u00e9t m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c th\u1eeba s\u1ed1, ta t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c 3 t\u00ednh ch\u1ea5t sau:<\/p>\n\n\n\n<p>T\u00ednh ch\u1ea5t s\u1ed1 1: T\u00ednh ch\u1ea5t giao ho\u00e1n<\/p>\n\n\n\n<p>Trong m\u1ed9t t\u00edch, c\u00e1c th\u1eeba s\u1ed1 c\u00f3 th\u1ec3 \u0111\u1ed5i v\u1ecb tr\u00ed cho nhau linh ho\u1ea1t. (K\u00e8m theo d\u1ea5u c\u1ee7a th\u1eeba s\u1ed1 \u0111\u00f3)<\/p>\n\n\n\n<p>V\u1edbi a, b \u20ac \u2124, ta c\u00f3: a . b = b . a<\/p>\n\n\n\n<p>T\u00ednh ch\u1ea5t s\u1ed1 2: T\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p<\/p>\n\n\n\n<p>Trong m\u1ed9t t\u00edch, c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p 2 th\u1eeba s\u1ed1 b\u1ea5t k\u1ef3 v\u1edbi nhau<\/p>\n\n\n\n<p>V\u1edbi a, b, c \u20ac \u2124, ta c\u00f3: a .(c.b) = (a.c) .b<\/p>\n\n\n\n<p>T\u00ednh ch\u1ea5t s\u1ed1 3: T\u00ednh ch\u1ea5t ph\u00e2n ph\u1ed1i c\u1ee7a ph\u00e9p nh\u00e2n \u0111\u1ed1i v\u1edbi ph\u00e9p c\u1ed9ng<\/p>\n\n\n\n<p>Ta c\u00f3: V\u1edbi a, b, c \u20ac \u2124, ta c\u00f3: a.(c+b) = ac+ ab<\/p>\n\n\n\n<p>T\u01b0\u01a1ng t\u1ef1, \u0111\u1ed1i v\u1edbi ph\u00e9p tr\u1eeb, ta c\u00f3:<\/p>\n\n\n\n<p>Ta c\u00f3: V\u1edbi a, b, c \u20ac \u2124, ta c\u00f3: a.(c-b) = ac- ab<\/p>\n\n\n\n<p>T\u1ed5ng h\u1ee3p l\u00fd thuy\u1ebft t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i b\u00e0i t\u1eadp v\u1ec1 t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>Nh\u1edd t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p, ta c\u00f3 th\u1ec3 nh\u1eafc \u0111\u1ebfn t\u00edch c\u1ee7a nhi\u1ec1u s\u1ed1 nguy\u00ean kh\u00e1c nhau.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5: a. b. c = (a. b). c = a. (b. c)<\/p>\n\n\n\n<p>Nh\u1edd c\u00e1c t\u00ednh ch\u1ea5t giao ho\u00e1n v\u00e0 k\u1ebft h\u1ee3p. Khi th\u1ef1c hi\u1ec7n t\u00edch c\u1ee7a nhi\u1ec1u s\u1ed1 nguy\u00ean, ta c\u00f3 th\u1ec3:<\/p>\n\n\n\n<p>Thay \u0111\u1ed5i v\u1ecb tr\u00ed c\u1ee7a c\u00e1c th\u1eeba s\u1ed1 trong t\u00edch.<\/p>\n\n\n\n<p>Nh\u00f3m c\u00e1c th\u1eeba s\u1ed1 trong t\u00edch m\u1ed9t c\u00e1ch t\u00f9y \u00fd. \u0110\u1ec3 c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1ch t\u00ednh.<\/p>\n\n\n\n<p>Ch\u00fa \u00fd v\u1ec1 t\u00edch c\u1ee7a c\u00e1c th\u1eeba s\u1ed1 nguy\u00ean \u00e2m:<\/p>\n\n\n\n<p>T\u00edch m\u1ed9t s\u1ed1 ch\u1eb5n th\u1eeba s\u1ed1 nguy\u00ean \u00e2m l\u00e0 m\u1ed9t s\u1ed1 c\u00f3 d\u1ea5u +<\/p>\n\n\n\n<p>T\u00edch c\u1ee7a m\u1ed9t s\u1ed1 l\u1ebb th\u1eeba s\u1ed1 nguy\u00ean \u00e2m l\u00e0 m\u1ed9t s\u1ed1 c\u00f3 d\u1ea5u \u2013<\/p>\n\n\n\n<p>H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>B\u00e0i 90 (trang 95 SGK To\u00e1n 6 T\u1eadp 1):<\/p>\n\n\n\n<p>H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>B\u00e0i 91 (trang 95 SGK To\u00e1n 6 T\u1eadp 1):<\/p>\n\n\n\n<p>H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>B\u00e0i 92 (trang 95 SGK To\u00e1n 6 T\u1eadp 1):<\/p>\n\n\n\n<p>H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>B\u00e0i 93 (trang 95 SGK To\u00e1n 6 T\u1eadp 1):<\/p>\n\n\n\n<p>H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>B\u00e0i 94 (trang 95 SGK To\u00e1n 6 T\u1eadp 1):<\/p>\n\n\n\n<p>H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp s\u00e1ch gi\u00e1o khoa T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n<\/p>\n\n\n\n<p>R\u00e8n luy\u1ec7n th\u00f3i quen t\u1ed1t, \u0111\u1ec3 con ph\u00e1t tri\u1ec3n t\u01b0 duy to\u00e1n h\u1ecdc<\/p>\n\n\n\n<p>B\u00ed quy\u1ebft \u0111\u1ec3 h\u1ecdc t\u1ed1t to\u00e1n h\u1ecdc kh\u00f4ng ch\u1ec9 \u0111\u1ed1i v\u1edbi to\u00e1n l\u1edbp 6. M\u00e0 c\u00f2n l\u00e0 b\u1ed9 m\u00f4n to\u00e1n trung h\u1ecdc ph\u1ed5 th\u00f4ng n\u00f3i chung l\u00e0 s\u1ef1 t\u1eadp trung. Tuy nhi\u00ean, m\u1ea5t t\u1eadp trung l\u1ea1i l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 g\u00e2y kh\u00f3 kh\u0103n cho c\u1ea3 nh\u1eefng <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> xu\u1ea5t s\u1eafc nh\u1ea5t. \u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, gi\u00fap c\u00e1c con n\u00e2ng cao tr\u00ecnh \u0111\u1ed9 to\u00e1n h\u1ecdc. Vietlearn t\u1ed5ng h\u1ee3p m\u1ed9t v\u00e0i b\u00ed quy\u1ebft d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n\n\n\n<p>Lo\u1ea1i b\u1ecf nh\u1eefng suy ngh\u0129 ngo\u00e0i l\u1ec1 ra kh\u1ecfi th\u1eddi gian <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a><\/p>\n\n\n\n<p>Trong \u0111\u1eddi s\u1ed1ng c\u0169ng nh\u01b0 trong qu\u00e1 tr\u00ecnh <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a>, c\u00e1c con s\u1ebd b\u1ecb nh\u1eefng suy ngh\u0129 v\u1ee5n v\u1eb7t l\u00e0m m\u1ea5t t\u1eadp trung. \u0110\u1ec3 lo\u1ea1i b\u1ecf nh\u1eefng \u0111i\u1ec1u \u0111\u00f3 l\u00e0 kh\u00f4ng \u0111\u01a1n gi\u1ea3n. \u0110\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi tr\u1ebb l\u1edbp 6 \u2013 trong kho\u1ea3ng th\u1eddi gian thay \u0111\u1ed5i t\u00e2m l\u00fd. B\u00ean c\u1ea1nh vi\u1ec7c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a>, 11 tu\u1ed5i l\u00e0 \u0111\u1ed9 tu\u1ed5i con c\u00f3 th\u00eam nh\u1eefng m\u1ed1i quan t\u00e2m ngo\u00e0i l\u1ec1 kh\u00e1c. V\u00ed d\u1ee5 nh\u01b0 chuy\u1ec7n b\u1ea1n b\u00e8, \u00e1p l\u1ef1c t\u00e2m l\u00fd, \u2026 Th\u1eadm ch\u00ed, c\u00f3 tr\u1ebb \u0111\u00e3 xu\u1ea5t hi\u1ec7n bi\u1ec3u hi\u1ec7n c\u1ee7a vi\u1ec7c y\u00eau s\u1edbm. Tr\u1ebb d\u1ec5 d\u00e0ng b\u1ecb thu h\u00fat b\u1edfi c\u00e1c b\u1ea1n kh\u00e1c gi\u1edbi. V\u00e0 nh\u1eefng suy ngh\u0129 m\u1edbi l\u1ea1 \u1ea5y s\u1ebd l\u00e0 r\u00e0o c\u1ea3n ng\u0103n b\u01b0\u1edbc tr\u1ebb gi\u1eef t\u1eadp trung trong h\u1ecdc t\u1eadp. Vi\u1ec7c n\u00e0y n\u1ebfu k\u00e9o d\u00e0i l\u00e2u s\u1ebd \u1ea3nh h\u01b0\u1edfng ti\u00eau c\u1ef1c \u0111\u1ebfn k\u1ebft qu\u1ea3 h\u1ecdc t\u1eadp c\u1ee7a con \u1edf tr\u01b0\u1eddng.<\/p>\n\n\n\n<p>Lo\u1ea1i b\u1ecf nh\u1eefng suy ngh\u0129 ngo\u00e0i l\u1ec1 ra kh\u1ecfi th\u1eddi gian h\u1ecdc t\u1eadp<\/p>\n\n\n\n<p>Kh\u00f4ng ch\u1ec9 c\u00e1c em h\u1ecdc sinh, ba m\u1eb9 c\u1ea7n \u0111\u1eb7t m\u1ed9t s\u1ef1 quan t\u00e2m \u0111\u00fang m\u1ee9c cho tr\u1ebb \u1edf giai \u0111o\u1ea1n n\u00e0y. H\u00e3y gi\u1eef cho con s\u1ef1 t\u1eadp trung b\u1eb1ng c\u00e1ch \u0111\u1ec3 con hi\u1ec3u r\u1eb1ng. C\u00e1c con ch\u00ednh l\u00e0 ng\u01b0\u1eddi \u0111i\u1ec1u khi\u1ec3n suy ngh\u0129 c\u1ee7a ch\u00ednh m\u00ecnh. V\u00ec v\u1eady, c\u00e1c con ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 t\u1ef1 m\u00ecnh lo\u1ea1i b\u1ecf nh\u1eefng suy ngh\u0129 ti\u00eau c\u1ef1c. Nh\u1eefng \u0111i\u1ec1u l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c h\u1ecdc c\u1ee7a b\u1ea3n th\u00e2n. Nh\u1eefng v\u1ea5n \u0111\u1ec1 cu\u1ed9c s\u1ed1ng kh\u00e1c, c\u00e1c con c\u00f3 th\u1ec3 ngh\u0129 t\u1edbi sau. Khi \u0111\u00e3 ho\u00e0n th\u00e0nh t\u1ea5t c\u1ea3 b\u00e0i t\u1eadp ph\u1ee5c v\u1ee5 cho vi\u1ec7c h\u1ecdc t\u1eadp c\u1ee7a con.<\/p>\n\n\n\n<p>Thay \u0111\u1ed5i ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp<\/p>\n\n\n\n<p>Ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp kh\u00f4ng ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 l\u00e0 nguy\u00ean nh\u00e2n quan tr\u1ecdng g\u00e2y ra vi\u1ec7c m\u1ea5t t\u1eadp trung c\u1ee7a con. Tr\u00ean th\u1ef1c t\u1ebf, ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nhi\u1ec1u nh\u1ea5t l\u00e0 \u0111\u1ecdc. Th\u00f4ng th\u01b0\u1eddng, khi mu\u1ed1n h\u1ecdc m\u1ed9t d\u1ea1ng to\u00e1n hay m\u1ed9t l\u01b0\u1ee3ng ki\u1ebfn th\u1ee9c m\u1edbi. C\u00e1c em h\u1ecdc sinh th\u01b0\u1eddng c\u00f3 xu th\u1ebf m\u1edf s\u00e1ch v\u1edf ra v\u00e0 \u0111\u1ecdc. \u0110\u00f3 l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p hay, kh\u00f4ng t\u1ed1n qu\u00e1 nhi\u1ec1u th\u1eddi gian. Cung c\u1ea5p ki\u1ebfn th\u1ee9c ch\u00ednh x\u00e1c v\u00e0 \u0111em l\u1ea1i k\u1ebft qu\u1ea3 ngay l\u1eadp t\u1ee9c.<\/p>\n\n\n\n<p>Tuy nhi\u00ean, kh\u00f4ng n\u00ean l\u1ea1m d\u1ee5ng qu\u00e1 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp n\u00e0y. V\u00ec nh\u01b0 v\u1eady, n\u00e3o b\u1ed9 kh\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m quen v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp kh\u00e1c nhau. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra c\u1ea3m gi\u00e1c nh\u00e0m ch\u00e1n v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng t\u1eadp trung c\u1ee7a tr\u1ebb.<\/p>\n\n\n\n<p>Thay \u0111\u1ed5i ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp<\/p>\n\n\n\n<p>Mu\u1ed1n kh\u1eafc ph\u1ee5c \u0111i\u1ec1u n\u00e0y, c\u00e1c con n\u00ean thay \u0111\u1ed5i ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp th\u01b0\u1eddng xuy\u00ean. V\u00ed d\u1ee5, c\u00e1c con c\u00f3 th\u1ec3 th\u1eed ph\u01b0\u01a1ng ph\u00e1p l\u1eafng nghe, xem video clip, ghi ch\u00e9p,\u2026<\/p>\n\n\n\n<p>L\u1eddi k\u1ebft:<\/p>\n\n\n\n<p>Tr\u00ean \u0111\u00e2y l\u00e0 t\u1ed5ng h\u1ee3p l\u00fd thuy\u1ebft v\u00e0 h\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp ch\u1ee7 \u0111\u1ec1 nh\u00e2n hai s\u1ed1 nguy\u00ean kh\u00e1c d\u1ea5u cho c\u00e1c em h\u1ecdc sinh l\u1edbp 6. B\u00ean c\u1ea1nh \u0111\u00f3, Vietlearn c\u0169ng \u0111\u01b0a ra m\u1ed9t v\u00e0i b\u00ed quy\u1ebft nh\u1ecf gi\u00fap c\u00e1c con t\u1eadp trung t\u1ed1t h\u01a1n, n\u00e2ng cao n\u0103ng l\u1ef1c h\u1ecdc to\u00e1n. \u0110\u1ec3 bi\u1ebft th\u00eam nhi\u1ec1u b\u00ed quy\u1ebft h\u01a1n. M\u1eddi ph\u1ee5 huynh v\u00e0 c\u00e1c con tham kh\u1ea3o th\u00eam c\u00e1c b\u00e0i vi\u1ebft kh\u00e1c c\u1ee7a Vietlearn trong m\u1ee5c to\u00e1n h\u1ecdc l\u1edbp 6 nh\u00e9! Ch\u00fac c\u00e1c con h\u1ecdc t\u1ed1t ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 6!<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>H\u1ecdc To\u00e1n 6 t\u1ea1i Vietlearn: Ph\u00e2n t\u00edch m\u1ed9t s\u1ed1 ra th\u1eeba s\u1ed1 nguy\u00ean t\u1ed1<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p nh\u00e2n l\u00e0 b\u00e0i t\u1ed5ng h\u1ee3p, gi\u00fap n\u00e2ng cao ki\u1ebfn th\u1ee9c \u0111\u1ea1i s\u1ed1. \u0110\u1ed3ng th\u1eddi l\u00e0m phong ph\u00fa th\u00eam nh\u1eefng d\u1ea1ng to\u00e1n v\u1edbi t\u00edch. \u0110\u00f3 l\u00e0 nh\u1eefng b\u00e0i c\u01a1 b\u1ea3n c\u00e1c em h\u1ecdc sinh \u0111\u00e3 \u0111\u01b0\u1ee3c h\u1ecdc tr\u01b0\u1edbc \u0111\u00e2y. H\u00f4m nay, h\u00e3y t\u1ed5ng h\u1ee3p l\u00fd thuy\u1ebft [&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":[9],"tags":[],"class_list":["post-2713","post","type-post","status-publish","format-standard","hentry","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2713","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=2713"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/2713\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=2713"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=2713"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=2713"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}