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{"id":27903,"date":"2018-04-19T12:29:19","date_gmt":"2018-04-19T05:29:19","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=27903"},"modified":"2018-04-19T12:29:19","modified_gmt":"2018-04-19T05:29:19","slug":"chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/","title":{"rendered":"Ch\u01b0\u01a1ng 1 – B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Kh\u1ea3o s\u00e1t s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 (Ph\u1ea7n 1)"},"content":{"rendered":"

C\u00e2u 1:<\/b>\u00a0\u0110\u01b0\u1eddng cong trong h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a m\u1ed9t h\u00e0m s\u1ed1 trong 4 h\u00e0m s\u1ed1 \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u1edf 4 ph\u01b0\u01a1ng \u00e1n A, B, C, D d\u01b0\u1edbi \u0111\u00e2y. H\u1ecfi h\u00e0m s\u1ed1 \u0111\u00f3 l\u00e0 h\u00e0m s\u1ed1 n\u00e0o?<\/p>\n

\"\"<\/p>\n

A. y = x4<\/sup>\u00a0+ 3x2<\/sup>\u00a0– 2<\/p>\n

B. y = x3<\/sup>\u00a0– 2x2<\/sup>\u00a0+ 1<\/p>\n

C. y = -4x4<\/sup>\u00a0+ x2<\/sup>\u00a0+ 4<\/p>\n

D. y = x4<\/sup>\u00a0– 2x2<\/sup>\u00a0+ 3<\/p>\n

C\u00e2u 2:<\/b>\u00a0\u0110\u1ed3 th\u1ecb trong h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 n\u00e0o?<\/p>\n

\"\"<\/p>\n

A. y = x2<\/sup>\u00a0– 2x + 1<\/p>\n

B. y = x3<\/sup>\u00a0+ 4x2<\/sup>\u00a0– 2x + 5<\/p>\n

C. y = x4<\/sup>\u00a0+ x2<\/sup>\u00a0+ 1<\/p>\n

D. y = x4<\/sup>\u00a0– 3x2<\/sup>\u00a0+ 5<\/p>\n

C\u00e2u 3:<\/b>\u00a0T\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 y = -x3<\/sup>\u00a0– 3x2<\/sup>\u00a0+ 1 l\u00e0:<\/p>\n

A. (-1; -1) \u00a0\u00a0\u00a0 B. (-2; -3) \u00a0\u00a0\u00a0 C. (0; 1) \u00a0\u00a0\u00a0 D. Kh\u00f4ng c\u00f3 \u0111\u00e1p \u00e1n<\/p>\n

C\u00e2u 4:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang?<\/p>\n

A. I(1; 0) l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a<\/p>\n

\"\"<\/p>\n

B. I(1; 0) l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a y = -x3<\/sup>\u00a0+ 3x2<\/sup>\u00a0– 2<\/p>\n

C. I(1; 0) l\u00e0 \u0111i\u1ec3m thu\u1ed9c \u0111\u1ed3 th\u1ecb<\/p>\n

\"\"<\/p>\n

D. I(1; 0) l\u00e0 giao \u0111i\u1ec3m c\u1ee7a y = x3<\/sup>\u00a0– 3x2<\/sup>\u00a0– 2 v\u1edbi tr\u1ee5c ho\u00e0nh.<\/p>\n

C\u00e2u 5:<\/b>\u00a0T\u00ecm m \u0111\u1ec3 b\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh x4<\/sup>\u00a0+ 2x2<\/sup>\u00a0\u2265 m lu\u00f4n \u0111\u00fang.<\/p>\n

A. m = 0 \u00a0\u00a0\u00a0 B. m < 0<\/p>\n

C. m \u2264 0 \u00a0\u00a0\u00a0 D. Kh\u00f4ng c\u00f3 \u0111\u00e1p \u00e1n<\/p>\n

H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n\n\n\n
1-D<\/td>\n2-C<\/td>\n3-A<\/td>\n4-B<\/td>\n5-C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e2u 1:<\/b><\/p>\n

Theo Ch\u00fa \u00fd \u1edf m\u1ee5c 2, \u0111\u1ed3 th\u1ecb \u1ee9ng v\u1edbi h\u00e0m b\u1eadc b\u1ed1n tr\u00f9ng ph\u01b0\u01a1ng c\u00f3 a > 0 v\u00e0 a, b, tr\u00e1i d\u1ea5u.<\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n D.<\/p>\n

C\u00e2u 2:<\/b><\/p>\n

Theo Ch\u00fa \u00fd \u1edf m\u1ee5c 2, \u0111\u1ed3 th\u1ecb \u1ee9ng v\u1edbi h\u00e0m b\u1eadc b\u1ed1n tr\u00f9ng ph\u01b0\u01a1ng c\u00f3 a > 0 v\u00e0 a, b, c\u00f9ng d\u1ea5u ho\u1eb7c h\u00e0m s\u1ed1 b\u1eadc hai v\u1edbi a > 0. Tuy nhi\u00ean \u0111\u1ec9nh c\u1ee7a parabol c\u1ee7a \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 y = -x3<\/sup>\u00a0– 3x2<\/sup>\u00a0+ 1 l\u00e0 I(1; 0) n\u1eb1m tr\u00ean tr\u1ee5c ho\u00e0nh.<\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n C.<\/p>\n

C\u00e2u 3:<\/b><\/p>\n

y’ = -3x2<\/sup>\u00a0– 6x; y” = -6x – 6; y” = 0 => x = -1<\/p>\n

V\u1eady \u0111i\u1ec3m U(-1; -1) l\u00e0 t\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a \u0111\u1ed3 th\u1ecb (theo ch\u00fa \u00fd \u1edf m\u1ee5c 1).<\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n A.<\/p>\n

C\u00e2u 4:<\/b><\/p>\n

A. T\u00e2m \u0111\u1ed1i x\u1ee9ng c\u1ee7a<\/p>\n

\"\"<\/p>\n

C. \u0110i\u1ec3m I(1; 0) kh\u00f4ng thu\u1ed9c \u0111\u1ed3 th\u1ecb<\/p>\n

\"\"<\/p>\n

D. \u0110i\u1ec3m I(1; 0) kh\u00f4ng thu\u1ed9c \u0111\u1ed3 th\u1ecb y = x3<\/sup>\u00a0– 3x2<\/sup>\u00a0– 2 n\u00ean kh\u00f4ng ph\u1ea3i l\u00e0 giao \u0111i\u1ec3m c\u1ee7a y = x3<\/sup>\u00a0– 3x2<\/sup>\u00a0– 2 v\u1edbi tr\u1ee5c ho\u00e0nh.<\/p>\n

Ch\u1ecdn \u0111\u00e1p \u00e1n B.<\/p>\n

C\u00e2u 5:<\/b><\/p>\n

X\u00e9t h\u00e0m y = x4<\/sup>\u00a0+ 2x2<\/sup>\u00a0\u2264 m c\u00f3 a = 1 > 0; b = 2 > 0 => a, b c\u00f9ng d\u1ea5u.<\/p>\n

\u0110\u1ed3 th\u1ecb c\u00f3 d\u1ea1ng nh\u01b0 h\u00ecnh b\u00ean.<\/p>\n

T\u1eeb \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 ta suy ra m \u2264 0 . Ch\u1ecdn \u0111\u00e1p \u00e1n C.<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e2u 1:\u00a0\u0110\u01b0\u1eddng cong trong h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a m\u1ed9t h\u00e0m s\u1ed1 trong 4 h\u00e0m s\u1ed1 \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u1edf 4 ph\u01b0\u01a1ng \u00e1n A, B, C, D d\u01b0\u1edbi \u0111\u00e2y. H\u1ecfi h\u00e0m s\u1ed1 \u0111\u00f3 l\u00e0 h\u00e0m s\u1ed1 n\u00e0o? A. y = x4\u00a0+ 3×2\u00a0– 2 B. y = x3\u00a0– 2×2\u00a0+ 1 C. y = -4×4\u00a0+ […]<\/p>\n","protected":false},"author":3,"featured_media":27904,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[157],"tags":[1447,1446],"yoast_head":"\nCh\u01b0\u01a1ng 1 - B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Kh\u1ea3o s\u00e1t s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 (Ph\u1ea7n 1)<\/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\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 1 - B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Kh\u1ea3o s\u00e1t s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 (Ph\u1ea7n 1)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 1:\u00a0\u0110\u01b0\u1eddng cong trong h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a m\u1ed9t h\u00e0m s\u1ed1 trong 4 h\u00e0m s\u1ed1 \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u1edf 4 ph\u01b0\u01a1ng \u00e1n A, B, C, D d\u01b0\u1edbi \u0111\u00e2y. 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A. y = x4\u00a0+ 3x2\u00a0– 2 B. y = x3\u00a0– 2x2\u00a0+ 1 C. y = -4x4\u00a0+ […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/\" \/>\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=\"2018-04-19T05:29:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/1-268.png\" \/>\n\t<meta property=\"og:image:width\" content=\"251\" \/>\n\t<meta property=\"og:image:height\" content=\"198\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"H\u00e0 Trang\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"H\u00e0 Trang\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/\",\"url\":\"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/\",\"name\":\"Ch\u01b0\u01a1ng 1 - 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B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Kh\u1ea3o s\u00e1t s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 (Ph\u1ea7n 1)","og_description":"C\u00e2u 1:\u00a0\u0110\u01b0\u1eddng cong trong h\u00ecnh d\u01b0\u1edbi \u0111\u00e2y l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a m\u1ed9t h\u00e0m s\u1ed1 trong 4 h\u00e0m s\u1ed1 \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u1edf 4 ph\u01b0\u01a1ng \u00e1n A, B, C, D d\u01b0\u1edbi \u0111\u00e2y. H\u1ecfi h\u00e0m s\u1ed1 \u0111\u00f3 l\u00e0 h\u00e0m s\u1ed1 n\u00e0o? A. y = x4\u00a0+ 3x2\u00a0– 2 B. y = x3\u00a0– 2x2\u00a0+ 1 C. y = -4x4\u00a0+ […]","og_url":"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/","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":"2018-04-19T05:29:19+00:00","og_image":[{"width":251,"height":198,"url":"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/1-268.png","type":"image\/png"}],"author":"H\u00e0 Trang","twitter_card":"summary_large_image","twitter_misc":{"Written by":"H\u00e0 Trang","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/","url":"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/","name":"Ch\u01b0\u01a1ng 1 - B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Kh\u1ea3o s\u00e1t s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 (Ph\u1ea7n 1)","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2018-04-19T05:29:19+00:00","dateModified":"2018-04-19T05:29:19+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/chuong-1-bai-tap-trac-nghiem-giai-tich-12-khao-sat-su-bien-thien-va-ve-do-thi-ham-so-phan-1\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"Ch\u01b0\u01a1ng 1 – B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Kh\u1ea3o s\u00e1t s\u1ef1 bi\u1ebfn thi\u00ean v\u00e0 v\u1ebd \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 (Ph\u1ea7n 1)"}]},{"@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\/2da855e5d06b553ac0065157cc261a45","name":"H\u00e0 Trang","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g","caption":"H\u00e0 Trang"},"url":"https:\/\/lop12.edu.vn\/author\/trangvth2\/"}]}},"_links":{"self":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/27903"}],"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\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/comments?post=27903"}],"version-history":[{"count":1,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/27903\/revisions"}],"predecessor-version":[{"id":27911,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/27903\/revisions\/27911"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media\/27904"}],"wp:attachment":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media?parent=27903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/categories?post=27903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/tags?post=27903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}