{"id":1043,"date":"2021-10-08T13:05:53","date_gmt":"2021-10-08T13:05:53","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=1043"},"modified":"2021-10-14T22:11:32","modified_gmt":"2021-10-14T15:11:32","slug":"phep-cong-cac-phan-thuc-dai-so-bi-quyet-cai-thien-mon-toan-8","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/phep-cong-cac-phan-thuc-dai-so-bi-quyet-cai-thien-mon-toan-8\/","title":{"rendered":"Ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 \u2013 B\u00ed quy\u1ebft c\u1ea3i thi\u1ec7n m\u00f4n to\u00e1n 8"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To\u00e1n h\u1ecdc \u0111\u1ea1i s\u1ed1 l\u00e0 m\u00f4n h\u1ecdc th\u00fa v\u1ecb nh\u01b0ng c\u0169ng g\u00e2y kh\u00f4ng \u00edt kh\u00f3 kh\u0103n cho c\u00e1c b\u1ea1n <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> trong vi\u1ec7c ghi nh\u1edb c\u00f4ng th\u1ee9c v\u00e0 \u00e1p d\u1ee5ng v\u00e0o \u0111a d\u1ea1ng c\u00e1c b\u00e0i t\u1eadp. Tuy nhi\u00ean, \u0111\u1eebng qu\u00e1 lo l\u1eafng nh\u00e9. H\u00f4m nay Vietlearn ch\u00fang t\u00f4i s\u1ebd chia s\u1ebb \u0111\u1ebfn c\u00e1c b\u1ea1n nh\u1eefng ki\u1ebfn th\u1ee9c v\u00e0 v\u1ea5n \u0111\u1ec1 xoay quanh ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1. \u0110\u1eebng b\u1ecf l\u1ee1 th\u00f4ng tin b\u1ed5 \u00edch ngay sau \u0111\u00e2y!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ebf n\u00e0o \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a v\u1ec1 ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 hay c\u00f2n g\u1ecdi ng\u1eafn g\u1ecdn l\u00e0 ph\u00e2n th\u1ee9c, l\u00e0 m\u1ed9t bi\u1ec3u th\u1ee9c c\u00f3 d\u1ea1ng A\/B, A \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u1eed th\u1ee9c (t\u1eed) v\u00e0 B \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1eabu th\u1ee9c (m\u1eabu). Trong \u0111\u00f3 bao g\u1ed3m c\u00e1c \u0111i\u1ec1u ki\u1ec7n:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A v\u00e0 B \u0111\u1ec1u l\u00e0 nh\u1eefng \u0111a ph\u1ee9c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B kh\u00e1c 0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110a th\u1ee9c s\u1ebd \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t ph\u00e2n th\u1ee9c n\u1ebfu c\u00f3 m\u1eabu b\u1eb1ng 1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 c\u1ea7n l\u01b0u \u00fd nh\u01b0 sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi hai ph\u00e2n th\u1ee9c A\/B v\u00e0 C\/D, ta c\u00f3: A\/B = C\/D v\u1edbi \u0111i\u1ec1u ki\u1ec7n A.D = B.C<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu nh\u00e2n c\u1ea3 t\u1eed v\u00e0 m\u1eabu c\u1ee7a m\u1ed9t ph\u00e2n th\u1ee9c kh\u00e1c 0 th\u00ec s\u1ebd \u0111\u01b0\u1ee3c m\u1ed9t ph\u00e2n th\u1ee9c b\u1eb1ng v\u1edbi ph\u01b0\u01a1ng th\u1ee9c \u0111\u00e3 cho: A\/B = (A.M)\/(B.M), M l\u00e0 \u0111a th\u1ee9c v\u00e0 M kh\u00e1c 0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u1ebfu chia c\u1ea3 t\u1eed v\u00e0 m\u1eabu cho m\u1ed9t ph\u00e2n th\u1ee9c cho m\u1ed9t nh\u00e2n t\u1eed chung, th\u00ec k\u1ebft qu\u1ea3 c\u0169ng s\u1ebd \u0111\u01b0\u1ee3c m\u1ed9t ph\u00e2n th\u1ee9c b\u1eb1ng v\u1edbi ph\u00e2n th\u1ee9c \u0111\u00e3 cho ban \u0111\u1ea7u: A\/B = (A:N)\/(B:N), N l\u00e0 \u0111a th\u1ee9c v\u00e0 N kh\u00e1c 0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc \u0111\u1ed5i d\u1ea5u trong ph\u00e2n th\u1ee9c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 d\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i t\u00ednh to\u00e1n, c\u00f3 nh\u1eefng c\u00e1ch \u0111\u1ed5i d\u1ea5u v\u1eabn \u0111\u01b0\u1ee3c m\u1ed9t ph\u00e2n th\u1ee9c nh\u01b0 \u0111\u00e3 cho ban \u0111\u1ea7u, bao g\u1ed3m:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed5i d\u1ea5u c\u1ea3 t\u1eed ph\u1ea7n m\u1eabu c\u1ee7a ph\u00e2n th\u1ee9c: A\/B = (-A)\/(-B)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed5i d\u1ea5u tr\u01b0\u1edbc ph\u00e2n th\u1ee9c v\u00e0 d\u1ea5u t\u1eed th\u1ee9c: A\/B = -(-A)\/B<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed5i d\u1ea5u tr\u01b0\u1edbc ph\u00e2n th\u1ee9c v\u00e0 d\u1ea5u c\u1ee7a m\u1eabu th\u1ee9c: A\/B = -(A)\/(-B)<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p> Quy \u0111\u1ed3ng m\u1eabu th\u1ee9c nhi\u1ec1u ph\u00e2n th\u1ee9c<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c d\u1ea1ng to\u00e1n th\u01b0\u1eddng g\u1eb7p v\u1ec1 ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ebfn th\u1ee9c to\u00e1n 8 ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 c\u00f3 \u00fd ngh\u0129a c\u1ef1c k\u1ef3 quan tr\u1ecdng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1, c\u00e1c d\u1ea1ng to\u00e1n c\u1ea7n ph\u1ea3i l\u00e0m quen v\u00e0 n\u1eafm r\u00f5 bao g\u1ed3m:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm \u0111i\u1ec1u ki\u1ec7n c\u1ee7a bi\u1ebfn sao cho ph\u00e2n th\u1ee9c c\u00f3 ngh\u0129a. Ph\u01b0\u01a1ng ph\u00e1p \u00e1p d\u1ee5ng ph\u1ed5 bi\u1ebfn l\u00e0 cho m\u1eabu th\u1ee9c kh\u00e1c 0 r\u1ed3i t\u00ecm k\u1ebft qu\u1ea3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ebfn \u0111\u1ec3 ph\u00e2n th\u1ee9c \u0111\u1ea1t \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb cho tr\u01b0\u1edbc. Ph\u01b0\u01a1ng ph\u00e1p \u00e1p d\u1ee5ng th\u01b0\u1eddng c\u00f3 3 b\u01b0\u1edbc: T\u00ecm \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 ph\u00e2n th\u1ee9c c\u00f3 ngh\u0129a, v\u1eadn d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n th\u1ee9c \u0111\u1ec3 kh\u1eed d\u1ea1ng ph\u00e2n th\u1ee9c, \u0111\u1ed1i chi\u1ebfu gi\u00e1 tr\u1ecb c\u1ee7a x v\u1edbi \u0111i\u1ec1u ki\u1ec7n ph\u00e2n th\u1ee9c c\u00f3 ngh\u0129a.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9ng minh ph\u00e2n th\u1ee9c lu\u00f4n c\u00f3 ngh\u0129a. Ph\u01b0\u01a1ng ph\u00e1p th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00e0 v\u1eadn d\u1ee5ng c\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i \u0111\u1ec3 t\u00ecm \u0111i\u1ec1u ki\u1ec7n m\u1eabu th\u1ee9c kh\u00e1c 0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e2n th\u1ee9c b\u1eb1ng nhau. C\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 nh\u01b0 A\/B = C\/D v\u1edbi \u0111i\u1ec1u ki\u1ec7n A.D = B.C, sau \u0111\u00f3 ch\u1ee9ng minh 2 v\u1ebf b\u1eb1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R\u00fat g\u1ecdn ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1. Ph\u01b0\u01a1ng ph\u00e1p th\u01b0\u1eddng \u00e1p d\u1ee5ng: ph\u00e2n t\u00edch c\u1ea3 t\u1eed th\u1ee9c v\u00e0 m\u1eabu th\u1ee9c th\u00e0nh nh\u00e2n t\u1eed, chia c\u1ea3 t\u1eed v\u00e0 m\u1eabu cho nh\u00e2n t\u1eed chung.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ee9ng minh ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 l\u00e0 t\u1ed1i gi\u1ea3n. Ph\u01b0\u01a1ng ph\u00e1p \u00e1p d\u1ee5ng: g\u1ecdi \u01b0\u1edbc chung l\u1edbn nh\u1ea5t c\u1ee7a c\u1ea3 t\u1eed v\u00e0 m\u1eabu th\u1ee9c l\u00e0 d, sau \u0111\u00f3 ch\u1ee9ng minh d=1 ho\u1eb7c d=-1 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c ki\u1ebfn th\u1ee9c v\u1ec1 n\u1ed9i v\u00e0 \u01b0\u1edbc, t\u00ednh ch\u1ea5t chia h\u1ebft,\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm gi\u00e1 tr\u1ecb nguy\u00ean c\u1ee7a x \u0111\u1ec3 ph\u00e2n th\u1ee9c c\u00f3 gi\u00e1 tr\u1ecb nguy\u00ean<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a ph\u00e2n th\u1ee9c t\u1ea1i 1 gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ebfn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm m\u1eabu th\u1ee9c chung c\u1ee7a nhi\u1ec1u ph\u00e2n th\u1ee9c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p tr\u00ean ph\u00e2n th\u1ee9c nh\u01b0: c\u1ed9ng tr\u1eeb ph\u00e2n th\u1ee9c, nh\u00e2n ph\u00e2n th\u1ee9c, chia ph\u00e2n th\u1ee9c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 c\u00f3 kh\u00f3 kh\u00f4ng?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 l\u00e0 m\u1ed9t trong nh\u1eefng d\u1ea1ng b\u00e0i to\u00e1n r\u1ea5t th\u01b0\u1eddng g\u1eb7p, l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 k\u1ebft h\u1ee3p t\u00ednh to\u00e1n gi\u1ea3i c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao c\u1ee7a ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1. M\u1ed9t s\u1ed1 l\u00fd thuy\u1ebft c\u1ea7n ghi nh\u1edb nh\u01b0 sau<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ed9ng hai ph\u00e2n th\u1ee9c c\u00f3 c\u00f9ng m\u1eabu th\u1ee9c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc c\u1ed9ng hai ph\u00e2n th\u1ee9c c\u00f3 c\u00f9ng m\u1eabu th\u1ee9c: c\u1ed9ng c\u00e1c t\u1eed th\u1ee9c v\u1edbi nhau v\u00e0 gi\u1eefa nguy\u00ean m\u1eabu th\u1ee9c A\/B + C\/B = (A+C)\/B<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ed9ng hai ph\u00e2n th\u1ee9c kh\u00e1c m\u1eabu th\u1ee9c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quy t\u1eafc c\u1ed9ng hai ph\u00e2n th\u1ee9c kh\u00e1c m\u1eabu th\u1ee9c: quy \u0111\u1ed3ng m\u1eabu th\u1ee9c, sau \u0111\u00f3 th\u1ef1c hi\u1ec7n c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c c\u00f3 c\u00f9ng m\u1eabu th\u1ee9c v\u1eeba t\u00ecm \u0111\u01b0\u1ee3c: A\/B + C\/D = [(A.D)\/(B.D)] + [(C.B)\/(B.D)] = (AD + BC)\/ BD<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t ph\u00e9p c\u1ed9ng c\u1ee7a c\u00e1c ph\u00e2n th\u1ee9c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c c\u0169ng c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t giao ho\u00e1n v\u00e0 k\u1ebft h\u1ee3p. Bi\u1ec3u th\u1ee9c c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Giao ho\u00e1n: A\/B + C\/D = C\/D + A\/B<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">K\u1ebft h\u1ee3p: A\/B + C\/D + E\/F = (A\/B + C\/D ) + E\/F = A\/B + (C\/D + E\/F)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c d\u1ea1ng to\u00e1n ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 b\u00e0i t\u1eadp th\u01b0\u1eddng g\u1eb7p<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t s\u1ed1 d\u1ea1ng to\u00e1n ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c th\u01b0\u1eddng g\u1eb7p nh\u01b0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c quy t\u1eafc c\u1ed9ng v\u00e0 c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p c\u1ed9ng ph\u00e2n th\u1ee9c nh\u01b0 tr\u00ean. C\u1ee5 th\u1ec3 c\u00e1c b\u01b0\u1edbc: quy \u0111\u1ed3ng m\u1eabu th\u1ee9c, c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c c\u00f9ng m\u1eabu, ph\u00e2n t\u00edch t\u1eed s\u1ed1 th\u00e0nh nh\u00e2n t\u1eed r\u1ed3i r\u00fat g\u1ecdn ph\u00e2n th\u1ee9c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c t\u1ea1i gi\u00e1 tr\u1ecb cho tr\u01b0\u1edbc c\u1ee7a bi\u1ebfn. C\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n theo c\u00e1c b\u01b0\u1edbc: r\u00fat g\u1ecdn bi\u1ec3u th\u1ee9c b\u1eb1ng c\u00e1c th\u1ef1c hi\u1ec7n ph\u00e9p c\u1ed9ng ph\u00e2n th\u1ee9c, thay gi\u00e1 tr\u1ecb cho tr\u01b0\u1edbc c\u1ee7a bi\u1ebfn v\u00e0o bi\u1ec3u th\u1ee9c t\u1ed3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 th\u00f4ng tin v\u1ec1 to\u00e1n 8 ph\u00e9p c\u1ed9ng c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 m\u00e0 ch\u00fang t\u00f4i mu\u1ed1n chia s\u1ebb. Hy v\u1ecdng c\u00e1c b\u1ea1n \u0111\u00e3 c\u00f3 nh\u1eefng ph\u00fat gi\u00e2y <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a> th\u1eadt th\u00fa v\u1ecb v\u00e0 b\u1ed5 \u00edch c\u00f9ng Vietlearn! N\u1ebfu mu\u1ed1n t\u00ecm hi\u1ec3u th\u00eam c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n kh\u00e1c, h\u00e3y truy c\u1eadp ngay v\u00e0o website: Vietlearn.org\/ c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec3 t\u00ecm hi\u1ec3u nh\u00e9!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ecm hi\u1ec3u th\u00eam:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e9p tr\u1eeb c\u00e1c ph\u00e2n th\u1ee9c \u0111\u1ea1i s\u1ed1 \u2013 \u00d4n luy\u1ec7n to\u00e1n h\u1ecdc c\u00f9ng Vietlearn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e9p nh\u00e2n<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn To\u00e1n h\u1ecdc \u0111\u1ea1i s\u1ed1 l\u00e0 m\u00f4n h\u1ecdc th\u00fa v\u1ecb nh\u01b0ng c\u0169ng g\u00e2y kh\u00f4ng \u00edt kh\u00f3 kh\u0103n cho c\u00e1c b\u1ea1n h\u1ecdc sinh trong vi\u1ec7c ghi nh\u1edb c\u00f4ng th\u1ee9c v\u00e0 \u00e1p d\u1ee5ng v\u00e0o \u0111a d\u1ea1ng c\u00e1c b\u00e0i t\u1eadp. Tuy nhi\u00ean, \u0111\u1eebng qu\u00e1 lo l\u1eafng nh\u00e9. H\u00f4m nay Vietlearn ch\u00fang t\u00f4i s\u1ebd [&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":[9,4],"tags":[],"class_list":["post-1043","post","type-post","status-publish","format-standard","hentry","category-toan-hoc","category-trung-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1043","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=1043"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1043\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1043"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1043"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1043"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}