C\u00e2u 3( 2 \u0111i\u1ec3m)<\/strong><\/p>\nCho hai h\u00e0m s\u1ed1:![\"f(x)=\\sqrt{x^{2}+1}\"](\"http:\/\/latex.codecogs.com\/gif.latex?f(x)=\\sqrt{x^{2}+1}\")
\u00a0; \u00a0![\"g(x)=sin2x+cos2x-2\\sqrt{2x}\"](\"http:\/\/latex.codecogs.com\/gif.latex?g(x)=sin2x+cos2x-2\\sqrt{2x}\")
<\/p>\n
a)\u00a0\u00a0\u00a0\u00a0\u00a0 Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh: f\u2019(x) > 0<\/p>\n
b)\u00a0\u00a0\u00a0\u00a0\u00a0 Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh g\u2019(x) = 0<\/p>\n
C\u00e2u 5<\/strong>:(<\/strong>3 \u0111i\u1ec3m<\/em>).<\/strong><\/p>\nCho h\u00ecnh ch\u00f3p SABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh a, SA vu\u00f4ng g\u00f3c v\u1edbi (ABCD),.SA = a\u221a2<\/p>\n
a)<\/strong>\u00a0Ch\u1ee9ng minh \u00a0\u00a0BC^(SAB) v\u00e0 (SAC)^(SBD)<\/p>\nb)<\/strong>\u00a0T\u00ednh \u00a0v\u1edbi \u00a0l\u00e0 g\u00f3c gi\u1eefa SC v\u00e0 (SAB).<\/p>\nc)<\/strong>\u00a0G\u1ecdi M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a SA, H l\u00e0 h\u00ecnh chi\u1ebfu c\u1ee7a S tr\u00ean (BCM). T\u00ednh SH theo a.<\/p>\n![\"\"](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0507\/quang-tri-1_1.png\")
<\/p>\n
![\"\"](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0507\/quang-tri-2.png\")
<\/p>\n
![\"\"](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0507\/quang-tri-3.png\")
<\/p>\n
<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 m\u00f4n To\u00e1n c\u1ee7a tr\u01b0\u1eddng THPT TX Qu\u1ea3ng Tr\u1ecb n\u0103m 2016, c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft, c\u00e1c em c\u00f9ng l\u00e0m th\u1eed v\u00e0 so s\u00e1nh \u0111\u00e1p \u00e1n nh\u00e9: C\u00e2u 3( 2 \u0111i\u1ec3m) Cho hai h\u00e0m s\u1ed1:\u00a0; \u00a0 a)\u00a0\u00a0\u00a0\u00a0\u00a0 Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh: f\u2019(x) > 0 b)\u00a0\u00a0\u00a0\u00a0\u00a0 Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh g\u2019(x) […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[171],"tags":[],"yoast_head":"\n
\u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 m\u00f4n To\u00e1n 2016 THPT Qu\u1ea3ng Tr\u1ecb<\/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\/de-thi-hoc-ki-2-lop-11-mon-toan-2016-thpt-quang-tri\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 m\u00f4n To\u00e1n 2016 THPT Qu\u1ea3ng Tr\u1ecb\" \/>\n<meta property=\"og:description\" content=\"\u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 m\u00f4n To\u00e1n c\u1ee7a tr\u01b0\u1eddng THPT TX Qu\u1ea3ng Tr\u1ecb n\u0103m 2016, c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft, c\u00e1c em c\u00f9ng l\u00e0m th\u1eed v\u00e0 so s\u00e1nh \u0111\u00e1p \u00e1n nh\u00e9: C\u00e2u 3( 2 \u0111i\u1ec3m) Cho hai h\u00e0m s\u1ed1:\u00a0; \u00a0 a)\u00a0\u00a0\u00a0\u00a0\u00a0 Gi\u1ea3i b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh: f\u2019(x) > 0 b)\u00a0\u00a0\u00a0\u00a0\u00a0 Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh g\u2019(x) […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/de-thi-hoc-ki-2-lop-11-mon-toan-2016-thpt-quang-tri\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - 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