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{"id":27389,"date":"2018-04-17T17:52:44","date_gmt":"2018-04-17T10:52:44","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=27389"},"modified":"2018-04-17T17:52:44","modified_gmt":"2018-04-17T10:52:44","slug":"chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/","title":{"rendered":"Ch\u01b0\u01a1ng 2 – B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Ph\u01b0\u01a1ng tr\u00ecnh m\u0169 v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh l\u00f4garit (Ph\u1ea7n 3)"},"content":{"rendered":"

C\u00e2u 1:<\/b>\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 10x<\/sup>\u00a0= 0,00001<\/p>\n

A. x = -log4 \u00a0\u00a0\u00a0B. x = -log5 \u00a0\u00a0\u00a0C. x = -4 \u00a0\u00a0\u00a0D. x = -5<\/p>\n

C\u00e2u 2:<\/b>\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh<\/p>\n

\"\"<\/p>\n

C\u00e2u 3:<\/b>\u00a0Cho ph\u01b0\u01a1ng tr\u00ecnh<\/p>\n

\"\"<\/p>\n

Nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y n\u1eb1m trong kho\u1ea3ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y ?<\/p>\n

\"\"<\/p>\n

C\u00e2u 4:<\/b>\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 32x – 3<\/sup>\u00a0= 7 . Vi\u1ebft nghi\u1ec7m d\u01b0\u1edbi d\u1ea1ng th\u1eadp ph\u00e2n, l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng ph\u1ea7n ngh\u00ecn.<\/p>\n

A. x = 2,38\u00a0\u00a0\u00a0B. x = 2,386 \u00a0\u00a0\u00a0C. x = 2,384\u00a0\u00a0\u00a0D. x = 1,782<\/p>\n

C\u00e2u 5:<\/b>\u00a0T\u00ednh t\u1ed5ng b\u00ecnh ph\u01b0\u01a1ng c\u00e1c nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh 4x2\u00a0+ 2<\/sup>\u00a0– 9.2x2\u00a0+ 2<\/sup>\u00a0+ 8 = 0<\/p>\n

A. 2\u00a0\u00a0\u00a0B. 4\u00a0\u00a0\u00a0C. 17\u00a0\u00a0\u00a0D. 65<\/p>\n

C\u00e2u 6:<\/b>\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 4x<\/sup>\u00a0+ 2x + 1<\/sup>\u00a0– 15 = 0. Vi\u1ebft nghi\u1ec7m t\u00ecm \u0111\u01b0\u1ee3c d\u01b0\u1edbi d\u1ea1ng th\u1eadp ph\u00e2n, l\u00e0m tr\u00f2n \u0111\u1ebfn h\u00e0ng ph\u1ea7n tr\u0103m<\/p>\n

A. x = 0,43 \u00a0\u00a0\u00a0 B. x = 0,63 \u00a0\u00a0\u00a0C. x = 1,58 \u00a0\u00a0\u00a0D. x = 2,32<\/p>\n

C\u00e2u 7:<\/b>\u00a0Gi\u1ea3 s\u1eed x1<\/sub>, x2<\/sub>\u00a0l\u00e0 hai nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh 7x<\/sup>\u00a0+ 2.71 – x<\/sup>\u00a0– 9 = 0.<\/p>\n

\"\"<\/p>\n

A. log2<\/sub>7 + 1\u00a0\u00a0\u00a0B. log7<\/sub>2 + 1 \u00a0\u00a0\u00a0C. log7<\/sub>2 \u00a0\u00a0\u00a0D. log2<\/sub>7<\/p>\n

C\u00e2u 8:<\/b>\u00a0T\u00ecm nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh 41 – x<\/sup>\u00a0= 32x + 1<\/sup><\/p>\n

\"\"<\/p>\n

H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n\n\n\n
1-D<\/td>\n2-B<\/td>\n3-A<\/td>\n4-B<\/td>\n5-A<\/td>\n6-C<\/td>\n7-D<\/td>\n8-C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

10x<\/sup>\u00a0= 0,00001 <=> 10x<\/sup>\u00a0= 10-5<\/sup>\u00a0<=> x = -5<\/p>\n

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

PT <=> 1 – e-2x<\/sup>\u00a0= 1\/2 <=> e-2x<\/sup>\u00a0= 1\/2 <=> -2x = ln(1\/2) = -ln2 <=> x = (1\/2)ln2<\/p>\n

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

PT <=> 5x – 1<\/sup>\u00a0= 5-2x<\/sup>\u00a0<=> x – 1 = -2x <=> 3x = 1 <=> x = 1\/3<\/p>\n

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

32x – 3<\/sup>\u00a0= 7 <=> 2x – 3 = log3<\/sub>7 <=> x = (1\/2)(log3<\/sub>7 + 3) \u2248 2,386<\/p>\n

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

\u0110\u1eb7t t = 2x2\u00a0+ 2<\/sup>, nh\u1eadn \u0111\u01b0\u1ee3c t2<\/sup>\u00a0– 9t + 8 = 0 <=> t = 1 ho\u1eb7c t = 8<\/p>\n

V\u1edbi t = 1, nh\u1eadn \u0111\u01b0\u1ee3c 2x2\u00a0+ 2<\/sup>\u00a0= 1 (v\u00f4 nghi\u1ec7m)<\/p>\n

V\u1edbi t = 8, ta c\u00f3: 2x2\u00a0+ 2<\/sup>\u00a0= 8 = 23<\/sup>\u00a0<=> x2<\/sup>\u00a0+ 2 = 3 <=> x = \u00b1 1<\/p>\n

T\u1ed5ng b\u00ecnh ph\u01b0\u01a1ng c\u00e1c nghi\u1ec7m: 12<\/sup>\u00a0+ (-1)2<\/sup>\u00a0= 2<\/p>\n

C\u00e2u 6:<\/b><\/p>\n

\u0110\u1eb7t t = 2x<\/sup>\u00a0> 0, nh\u1eadn \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng tr\u00ecnh t2<\/sup>\u00a0+ 2t – 15 = 0 <=> t = -5 (lo\u1ea1i) ho\u1eb7c t = 3 hay 2x<\/sup>\u00a0= 3 <=> x = log2<\/sub>3 = ln3\/ln2 \u2248 1,58<\/p>\n

C\u00e2u 7:<\/b><\/p>\n

\u0110\u1eb7t t = 7x<\/sup>, \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng tr\u00ecnh:<\/p>\n

\"\"<\/p>\n

T\u1eeb \u0111\u00f3 t\u00ecm \u0111\u01b0\u1ee3c x1<\/sub>\u00a0= 1, x2<\/sub>\u00a0= log7<\/sub>2. Ta c\u00f3:<\/p>\n

\"\"<\/p>\n

C\u00e2u 8:<\/b><\/p>\n

41 – x<\/sup>\u00a0= 32x + 1<\/sup>\u00a0<=> 22 – 2x<\/sup>\u00a0= 32x + 1<\/sup><\/p>\n

L\u1ea5y l\u00f4garit c\u01a1 s\u1ed1 3 hai v\u1ebf ta \u0111\u01b0\u1ee3c :<\/p>\n

(2 – 2x)log3<\/sub>2 = 2x + 1 <=> 2x(log3<\/sub>2 + 1) = 2log3<\/sub>2 – 1<\/p>\n

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

C\u00e2u 1:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 10x\u00a0= 0,00001 A. x = -log4 \u00a0\u00a0\u00a0B. x = -log5 \u00a0\u00a0\u00a0C. x = -4 \u00a0\u00a0\u00a0D. x = -5 C\u00e2u 2:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh C\u00e2u 3:\u00a0Cho ph\u01b0\u01a1ng tr\u00ecnh Nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y n\u1eb1m trong kho\u1ea3ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y ? C\u00e2u 4:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 32x – 3\u00a0= 7 . Vi\u1ebft nghi\u1ec7m d\u01b0\u1edbi d\u1ea1ng […]<\/p>\n","protected":false},"author":3,"featured_media":27390,"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 2 - B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Ph\u01b0\u01a1ng tr\u00ecnh m\u0169 v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh l\u00f4garit (Ph\u1ea7n 3)<\/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-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 2 - B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Ph\u01b0\u01a1ng tr\u00ecnh m\u0169 v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh l\u00f4garit (Ph\u1ea7n 3)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 1:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 10x\u00a0= 0,00001 A. x = -log4 \u00a0\u00a0\u00a0B. x = -log5 \u00a0\u00a0\u00a0C. x = -4 \u00a0\u00a0\u00a0D. x = -5 C\u00e2u 2:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh C\u00e2u 3:\u00a0Cho ph\u01b0\u01a1ng tr\u00ecnh Nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y n\u1eb1m trong kho\u1ea3ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y ? C\u00e2u 4:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 32x – 3\u00a0= 7 . 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B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Ph\u01b0\u01a1ng tr\u00ecnh m\u0169 v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh l\u00f4garit (Ph\u1ea7n 3)","og_description":"C\u00e2u 1:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 10x\u00a0= 0,00001 A. x = -log4 \u00a0\u00a0\u00a0B. x = -log5 \u00a0\u00a0\u00a0C. x = -4 \u00a0\u00a0\u00a0D. x = -5 C\u00e2u 2:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh C\u00e2u 3:\u00a0Cho ph\u01b0\u01a1ng tr\u00ecnh Nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh n\u00e0y n\u1eb1m trong kho\u1ea3ng n\u00e0o d\u01b0\u1edbi \u0111\u00e2y ? C\u00e2u 4:\u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh 32x – 3\u00a0= 7 . Vi\u1ebft nghi\u1ec7m d\u01b0\u1edbi d\u1ea1ng […]","og_url":"https:\/\/lop12.edu.vn\/chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/","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":"2018-04-17T10:52:44+00:00","og_image":[{"width":264,"height":151,"url":"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/1-231.png","type":"image\/png"}],"author":"H\u00e0 Trang","twitter_card":"summary_large_image","twitter_misc":{"Written by":"H\u00e0 Trang","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/","url":"https:\/\/lop12.edu.vn\/chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/","name":"Ch\u01b0\u01a1ng 2 - B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Ph\u01b0\u01a1ng tr\u00ecnh m\u0169 v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh l\u00f4garit (Ph\u1ea7n 3)","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2018-04-17T10:52:44+00:00","dateModified":"2018-04-17T10:52:44+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/chuong-2-bai-tap-trac-nghiem-giai-tich-12-phuong-trinh-mu-va-phuong-trinh-logarit-phan-3\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"Ch\u01b0\u01a1ng 2 – B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m Gi\u1ea3i t\u00edch 12: Ph\u01b0\u01a1ng tr\u00ecnh m\u0169 v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh l\u00f4garit (Ph\u1ea7n 3)"}]},{"@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\/27389"}],"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=27389"}],"version-history":[{"count":1,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/27389\/revisions"}],"predecessor-version":[{"id":27398,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/27389\/revisions\/27398"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media\/27390"}],"wp:attachment":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media?parent=27389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/categories?post=27389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/tags?post=27389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}