https://dashboard.mempawahkab.go.id/wp-content/plugins/ https://www.kungfuology.com/mt-static/ https://pgsd.fkip.unsulbar.ac.id/wp-content/server/https://www.kungfuology.com/home/plugins/ https://land.ubiz.ua/assets/img/ https://sentraki.polimarin.ac.id/js/slot-dana/ https://qml.cvc.uab.es/responsivl/slot-gacor/ https://sentraki.polimarin.ac.id/public/js/ https://fh.uki.ac.id/nul/slot-pulsa/ https://ncc.potensi-utama.ac.id/wp-content/plugins/ https://pgsd.fkip.unsulbar.ac.id/wp-includes/qris/ https://aktasidangmd.gkjw.or.id/aset/css/ https://simpenmas.untirta.ac.id/plugins/slot-dana/
{"id":44338,"date":"2019-10-15T15:22:17","date_gmt":"2019-10-15T08:22:17","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=44338"},"modified":"2019-10-15T15:22:21","modified_gmt":"2019-10-15T08:22:21","slug":"giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/","title":{"rendered":"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t"},"content":{"rendered":"\n

Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 \u0110\u1ea1i s\u1ed1 B\u00e0i 3 trang 89<\/strong>: <\/p>\n\n\n\n

a) Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh -2x + 3 > 0 v\u00e0 bi\u1ec3u di\u1ec5n tr\u00ean tr\u1ee5c s\u1ed1 t\u1eadp nghi\u1ec7m c\u1ee7a n\u00f3.<\/ins><\/p>\n\n\n\n

b) T\u1eeb \u0111\u00f3 h\u00e3y ch\u1ec9 ra c\u00e1c kho\u1ea3ng m\u00e0 n\u1ebfu x l\u1ea5y gi\u00e1 tr\u1ecb trong \u0111\u00f3 th\u00ec nh\u1ecb th\u1ee9c f(x) = -2x + 3 c\u00f3 gi\u00e1 tr\u1ecb<\/p>\n\n\n\n

Tr\u00e1i d\u1ea5u v\u1edbi h\u1ec7 s\u1ed1 c\u1ee7a x;<\/p>\n\n\n\n

C\u00f9ng d\u1ea5u v\u1edbi h\u1ec7 s\u1ed1 c\u1ee7a x.<\/p>\n\n\n\n

L\u1eddi gi\u1ea3i<\/strong><\/p>\n\n\n\n

a)-2x + 3 > 0 \u21d4 -2x > -3 \u21d4 x < 3\/2<\/p>\n\n\n\n

Bi\u1ec3u di\u1ec5n t\u1eadp nghi\u1ec7m tr\u00ean tr\u1ee5c s\u1ed1:<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

b) Nh\u1ecb th\u1ee9c f(x) = -2x + 3 c\u00f3 gi\u00e1 tr\u1ecb:<\/p>\n\n\n\n

Tr\u00e1i d\u1ea5u v\u1edbi h\u1ec7 s\u1ed1 c\u1ee7a x khi x < 3\/2<\/p>\n\n\n\n

C\u00f9ng d\u1ea5u v\u1edbi h\u1ec7 s\u1ed1 c\u1ee7a x khi x > 3\/2<\/p>\n\n\n\n

Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 \u0110\u1ea1i s\u1ed1 B\u00e0i 3 trang 90<\/strong>: X\u00e9t d\u1ea5u c\u00e1c nh\u1ecb th\u1ee9c f(x) = 3x + 2, g(x) = -2x + 5.<\/ins><\/p>\n\n\n\n

L\u1eddi gi\u1ea3i<\/strong><\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 \u0110\u1ea1i s\u1ed1 B\u00e0i 3 trang 92<\/strong>: X\u00e9t d\u1ea5u bi\u1ec3u th\u1ee9c f(x) = (2x \u2013 1)(-x + 3)<\/ins><\/p>\n\n\n\n

L\u1eddi gi\u1ea3i<\/strong><\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 \u0110\u1ea1i s\u1ed1 B\u00e0i 3 trang 92<\/strong>: Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh x3<\/sup> \u2013 4x < 0.<\/ins><\/p>\n\n\n\n

L\u1eddi gi\u1ea3i<\/strong><\/p>\n\n\n\n

x3<\/sup> \u2013 4x < 0 \u21d4 x(x2<\/sup> – 4) < 0 \u21d4 x(x – 2)(x + 2) < 0<\/p>\n\n\n\n

Ta c\u00f3 b\u1ea3ng x\u00e9t d\u1ea5u<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

T\u1eeb b\u1ea3ng x\u00e9t d\u1ea5u ta c\u00f3 t\u1eadp nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh l\u00e0:<\/p>\n\n\n\n

S = (-\u221e;2) \u222a (0;2)<\/p>\n\n\n\n

B\u00e0i 1 (trang 94 SGK \u0110\u1ea1i S\u1ed1 10)<\/strong>: X\u00e9t d\u1ea5u c\u00e1c bi\u1ec3u th\u1ee9c:<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

L\u1eddi gi\u1ea3i<\/strong><\/ins><\/p>\n\n\n\n

a) Nh\u1ecb th\u1ee9c 2x \u2013 1 c\u00f3 nghi\u1ec7m l\u00e0 1\/2 ; nh\u1ecb th\u1ee9c x + 3 c\u00f3 nghi\u1ec7m l\u00e0 \u20133. <\/p>\n\n\n\n

Ta c\u00f3 b\u1ea3ng x\u00e9t d\u1ea5u <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

K\u1ebft lu\u1eadn : <\/p>\n\n\n\n

+ f(x) > 0 khi x < \u20133 ho\u1eb7c x > 1\/2<\/p>\n\n\n\n

+ f(x) < 0 khi \u20133 < x < 1\/2<\/p>\n\n\n\n

+ f(x) = 0 khi x = \u20133 ho\u1eb7c x = 1\/2. <\/p>\n\n\n\n

b) Nh\u1ecb th\u1ee9c \u20133x \u2013 3 c\u00f3 nghi\u1ec7m l\u00e0 \u20131; nh\u1ecb th\u1ee9c x + 2 c\u00f3 nghi\u1ec7m l\u00e0 \u20132 ; nh\u1ecb th\u1ee9c x + 3 c\u00f3 nghi\u1ec7m l\u00e0 \u20133. <\/p>\n\n\n\n

Ta c\u00f3 b\u1ea3ng x\u00e9t d\u1ea5u : <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

K\u1ebft lu\u1eadn : <\/p>\n\n\n\n

+ f(x) < 0 khi \u20133 < x < \u20132 ho\u1eb7c x > \u20131<\/p>\n\n\n\n

+ f(x) > 0 khi x < \u20133 ho\u1eb7c \u20132 < x < \u20131. <\/p>\n\n\n\n

+ f(x) = 0 khi x = \u20133 ho\u1eb7c x = \u20132 ho\u1eb7c x = \u20131. <\/ins><\/p>\n\n\n\n

c) Ta c\u00f3: <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

Nh\u1ecb th\u1ee9c \u20135x \u2013 11 c\u00f3 nghi\u1ec7m l\u00e0 \u201311\/5, nh\u1ecb th\u1ee9c 3x +1 c\u00f3 nghi\u1ec7m l\u00e0 \u20131\/3, nh\u1ecb th\u1ee9c 2 \u2013 x c\u00f3 nghi\u1ec7m l\u00e0 2. <\/p>\n\n\n\n

Ta c\u00f3 b\u1ea3ng x\u00e9t d\u1ea5u: <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

K\u1ebft lu\u1eadn : <\/p>\n\n\n\n

+ f(x) > 0 khi \u201311\/5 < x < \u20131\/3 ho\u1eb7c x > 2. <\/p>\n\n\n\n

+ f(x) < 0 khi x < \u201311\/5 ho\u1eb7c \u20131\/3 < x < 2. <\/p>\n\n\n\n

+ f(x) = 0 khi x = \u201311\/5. <\/p>\n\n\n\n

+ Khi x = \u20131\/3 ho\u1eb7c x = 2, f(x) kh\u00f4ng x\u00e1c \u0111\u1ecbnh. <\/p>\n\n\n\n

d) f(x) = 4x2<\/sup> \u2013 1 = (2x \u2013 1)(2x + 1) <\/p>\n\n\n\n

Nh\u1ecb th\u1ee9c 2x \u2013 1 c\u00f3 nghi\u1ec7m x = 1\/2, nh\u1ecb th\u1ee9c 2x + 1 c\u00f3 nghi\u1ec7m x = \u20131\/2. <\/p>\n\n\n\n

Ta c\u00f3 b\u1ea3ng x\u00e9t d\u1ea5u: <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

K\u1ebft lu\u1eadn : <\/p>\n\n\n\n

+ f(x) > 0 khi x < \u20131\/2 ho\u1eb7c x > 1\/2. <\/p>\n\n\n\n

+ f(x) < 0 khi \u20131\/2 < x < 1\/2<\/p>\n\n\n\n

+ f(x) = 0 khi x = 1\/2 ho\u1eb7c x = \u20131\/2.<\/p>\n\n\n\n

B\u00e0i 2 (trang 94 SGK \u0110\u1ea1i S\u1ed1 10)<\/strong>: Gi\u1ea3i c\u00e1c b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh:<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

L\u1eddi gi\u1ea3i<\/strong><\/ins><\/p>\n\n\n\n

a) \u0110i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh x \u2260 1 v\u00e0 x \u2260 1\/2.<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

C\u00e1c nh\u1ecb th\u1ee9c \u2013x + 3; x \u2013 1; 2x \u2013 1 c\u00f3 nghi\u1ec7m l\u1ea7n l\u01b0\u1ee3t l\u00e0 3; 1; 1\/2.<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

D\u1ef1a v\u00e0o b\u1ea3ng x\u00e9t d\u1ea5u th\u1ea5y <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n
\"Gi\u1ea3i<\/figure>\n\n\n\n

V\u1eady t\u1eadp nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh l\u00e0 \n<\/p>\n\n\n\n

b) \u0110i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh x \u2260 1 v\u00e0 x \u2260 \u20131. <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n
\"Gi\u1ea3i<\/figure>\n\n\n\n

\n (Nh\u00e2n c\u1ea3 hai v\u1ebf c\u1ee7a B\u0110T v\u1edbi (x \u2013 1)2 > 0). <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

\u0110\u1eb7t \n. Ta c\u00f3 b\u1ea3ng x\u00e9t d\u1ea5u sau: <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

D\u1ef1a v\u00e0o b\u1ea3ng x\u00e9t d\u1ea5u ta th\u1ea5y<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

V\u1eady b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 t\u1eadp nghi\u1ec7m S = (\u2013\u221e; \u20131] \u222a (0; 3)\\{1}<\/ins><\/p>\n\n\n\n

c) \u0110i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh x \u2260 0; x \u2260 \u20133; x \u2260 \u20134. <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n
\"Gi\u1ea3i<\/figure>\n\n\n\n

\u0110\u1eb7t \n. Ta c\u00f3 b\u1ea3ng bi\u1ebfn thi\u00ean sau: <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

D\u1ef1a v\u00e0o b\u1ea3ng x\u00e9t d\u1ea5u ta th\u1ea5y<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

V\u1eady t\u1eadp nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh l\u00e0 S = (\u201312; \u20134) \u222a (\u20133; 0). <\/p>\n\n\n\n

d) \u0110i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh x \u2260 \u00b11.<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n
\"Gi\u1ea3i
\u0110\u1eb7t<\/figcaption><\/figure>\n\n\n\n

. Ta c\u00f3 b\u1ea3ng bi\u1ebfn thi\u00ean: <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

D\u1ef1a v\u00e0o b\u1ea3ng bi\u1ebfn thi\u00ean ta th\u1ea5y \n<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

V\u1eady b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 t\u1eadp nghi\u1ec7m l\u00e0 <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

B\u00e0i 3 (trang 94 SGK \u0110\u1ea1i S\u1ed1 10)<\/strong>: Gi\u1ea3i c\u00e1c b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh:<\/p>\n\n\n\n

a) |5x – 4| \u2265 6<\/ins><\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

b) <\/p>\n\n\n\n

L\u1eddi gi\u1ea3i<\/strong><\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

V\u1eady b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 t\u1eadp nghi\u1ec7m<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

<\/ins><\/p>\n\n\n\n

b) \u0110i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh x \u2260 1; x \u2260 \u20132. <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

Ta c\u00f3 b\u1ea3ng x\u00e9t d\u1ea5u sau: <\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n\n\n\n

D\u1ef1a v\u00e0o b\u1ea3ng x\u00e9t d\u1ea5u ta th\u1ea5y (x + 1)(x + 5) > 0 khi \u20135 < x < \u20131. <\/p>\n\n\n\n

V\u1eady b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh c\u00f3 t\u1eadp nghi\u1ec7m (\u20135; \u20131)\\{\u20132}. <\/p>\n\n\n\n

Ki\u1ebfn th\u1ee9c \u00e1p d\u1ee5ng<\/strong><\/p>\n\n\n\n

+ V\u1edbi a > 0 ta c\u00f3: <\/p>\n\n\n\n

     |f(x)| \u2264 a \u21d4 \u2013a \u2264 f(x) \u2264 a. <\/p>\n\n\n\n

     |f(x)| \u2265 a \u21d4 f(x) \u2265 a ho\u1eb7c f(x) \u2264 \u2013a <\/p>\n\n\n\n

+ f2<\/sup>(x) \u2264 g2<\/sup>(x) \u21d4 |f(x)| \u2264 |g(x)| v\u00ec \n<\/p>\n\n\n\n

\"Gi\u1ea3i<\/figure>\n","protected":false},"excerpt":{"rendered":"

Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 \u0110\u1ea1i s\u1ed1 B\u00e0i 3 trang 89: a) Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh -2x + 3 > 0 v\u00e0 bi\u1ec3u di\u1ec5n tr\u00ean tr\u1ee5c s\u1ed1 t\u1eadp nghi\u1ec7m c\u1ee7a n\u00f3. b) T\u1eeb \u0111\u00f3 h\u00e3y ch\u1ec9 ra c\u00e1c kho\u1ea3ng m\u00e0 n\u1ebfu x l\u1ea5y gi\u00e1 tr\u1ecb trong \u0111\u00f3 th\u00ec nh\u1ecb th\u1ee9c f(x) = -2x + […]<\/p>\n","protected":false},"author":12,"featured_media":44340,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1633],"tags":[],"yoast_head":"\n[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t\" \/>\n<meta property=\"og:description\" content=\"Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 \u0110\u1ea1i s\u1ed1 B\u00e0i 3 trang 89: a) Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh -2x + 3 > 0 v\u00e0 bi\u1ec3u di\u1ec5n tr\u00ean tr\u1ee5c s\u1ed1 t\u1eadp nghi\u1ec7m c\u1ee7a n\u00f3. b) T\u1eeb \u0111\u00f3 h\u00e3y ch\u1ec9 ra c\u00e1c kho\u1ea3ng m\u00e0 n\u1ebfu x l\u1ea5y gi\u00e1 tr\u1ecb trong \u0111\u00f3 th\u00ec nh\u1ecb th\u1ee9c f(x) = -2x + […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam\" \/>\n<meta property=\"article:published_time\" content=\"2019-10-15T08:22:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-10-15T08:22:21+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2019\/10\/c43.png\" \/>\n\t<meta property=\"og:image:width\" content=\"510\" \/>\n\t<meta property=\"og:image:height\" content=\"152\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Nguy\u1ec5n M\u01a1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nguy\u1ec5n M\u01a1\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/\",\"url\":\"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/\",\"name\":\"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t\",\"isPartOf\":{\"@id\":\"https:\/\/lop12.edu.vn\/#website\"},\"datePublished\":\"2019-10-15T08:22:17+00:00\",\"dateModified\":\"2019-10-15T08:22:21+00:00\",\"author\":{\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/104e47bfb6189ee6fa1aa67e1f9107a2\"},\"breadcrumb\":{\"@id\":\"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/lop12.edu.vn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/lop12.edu.vn\/#website\",\"url\":\"https:\/\/lop12.edu.vn\/\",\"name\":\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/lop12.edu.vn\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/104e47bfb6189ee6fa1aa67e1f9107a2\",\"name\":\"Nguy\u1ec5n M\u01a1\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/20d6905502209505aa7a21b55419ebe9?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/20d6905502209505aa7a21b55419ebe9?s=96&d=mm&r=g\",\"caption\":\"Nguy\u1ec5n M\u01a1\"},\"url\":\"https:\/\/lop12.edu.vn\/author\/mont\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/","og_locale":"en_US","og_type":"article","og_title":"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t","og_description":"Tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi To\u00e1n 10 \u0110\u1ea1i s\u1ed1 B\u00e0i 3 trang 89: a) Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh -2x + 3 > 0 v\u00e0 bi\u1ec3u di\u1ec5n tr\u00ean tr\u1ee5c s\u1ed1 t\u1eadp nghi\u1ec7m c\u1ee7a n\u00f3. b) T\u1eeb \u0111\u00f3 h\u00e3y ch\u1ec9 ra c\u00e1c kho\u1ea3ng m\u00e0 n\u1ebfu x l\u1ea5y gi\u00e1 tr\u1ecb trong \u0111\u00f3 th\u00ec nh\u1ecb th\u1ee9c f(x) = -2x + […]","og_url":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/","og_site_name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam","article_published_time":"2019-10-15T08:22:17+00:00","article_modified_time":"2019-10-15T08:22:21+00:00","og_image":[{"width":510,"height":152,"url":"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2019\/10\/c43.png","type":"image\/png"}],"author":"Nguy\u1ec5n M\u01a1","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Nguy\u1ec5n M\u01a1","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/","url":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/","name":"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2019-10-15T08:22:17+00:00","dateModified":"2019-10-15T08:22:21+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/104e47bfb6189ee6fa1aa67e1f9107a2"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/giai-toan-10-chuong-4-bat-dang-thuc-bat-phuong-trinh-bai-3-dau-cua-nhi-thuc-bac-nhat\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"[Gi\u1ea3i To\u00e1n 10] Ch\u01b0\u01a1ng 4: B\u1ea5t \u0111\u1eb3ng th\u1ee9c. B\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh\/ B\u00e0i 3: D\u1ea5u c\u1ee7a nh\u1ecb th\u1ee9c b\u1eadc nh\u1ea5t"}]},{"@type":"WebSite","@id":"https:\/\/lop12.edu.vn\/#website","url":"https:\/\/lop12.edu.vn\/","name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/lop12.edu.vn\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/104e47bfb6189ee6fa1aa67e1f9107a2","name":"Nguy\u1ec5n M\u01a1","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/20d6905502209505aa7a21b55419ebe9?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/20d6905502209505aa7a21b55419ebe9?s=96&d=mm&r=g","caption":"Nguy\u1ec5n M\u01a1"},"url":"https:\/\/lop12.edu.vn\/author\/mont\/"}]}},"_links":{"self":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/44338"}],"collection":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/comments?post=44338"}],"version-history":[{"count":1,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/44338\/revisions"}],"predecessor-version":[{"id":44341,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/44338\/revisions\/44341"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media\/44340"}],"wp:attachment":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media?parent=44338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/categories?post=44338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/tags?post=44338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}