B\u00e0i 5 (trang 145 sgk Gi\u1ea3i T\u00edch 12 n\u00e2ng cao):<\/b>\u00a0<\/span><\/p>\nD\u00f9ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed5i bi\u1ebfn s\u1ed1, t\u00ecm nguy\u00ean h\u00e0m c\u1ee7a c\u00e1c h\u00e0m s\u1ed1 sau:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-374.png\")
<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/2-240.png\")
<\/p>\n
\u0110\u1eb7t u=1-x2<\/sup>\u00a0th\u00ec du = -3x2<\/sup>\u00a0dx, n\u00ean:<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/3-127.png\")
<\/p>\n
\u0110\u1eb7t u=1-x2<\/sup>\u00a0th\u00ec du = -2xdx<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/4-65.png\")
<\/p>\n
B\u00e0i 6 (trang 145 sgk Gi\u1ea3i T\u00edch 12 n\u00e2ng cao):<\/b>\u00a0<\/span><\/p>\nD\u00f9ng ph\u01b0\u01a1ng ph\u00e1p l\u1ea5y nguy\u00ean h\u00e0m t\u1eebng ph\u1ea7n, t\u00ecm nguy\u00ean h\u00e0m c\u00e1c h\u00e0m s\u1ed1 sau:<\/p>\n
a) f(x)=xsin(x\/2) \u00a0\u00a0\u00a0 b) f(x)=x2<\/sup>\u00a0cosx<\/p>\nc) f(x)=x.ex<\/sup> \u00a0\u00a0\u00a0 d) f(x)=x3<\/sup>\u00a0ln\u2061(2x)<\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-375.png\")
<\/p>\n
Cho n\u00ean: \u222bx2<\/sup>\u00a0cosxdx=x2<\/sup>\u00a0sinx-2[-xcosx+\u222bcosxdx]=x2<\/sup>\u00a0sinx+2xcosx-2sinx+C<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/3-128.png\")
<\/p>\n
Cho n\u00ean: \u222bxex<\/sup>\u00a0dx=xex<\/sup>-\u222bex<\/sup>\u00a0dx=xex<\/sup>-ex<\/sup>+C<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/4-66.png\")
<\/p>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 5 (trang 145 sgk Gi\u1ea3i T\u00edch 12 n\u00e2ng cao):\u00a0 D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed5i bi\u1ebfn s\u1ed1, t\u00ecm nguy\u00ean h\u00e0m c\u1ee7a c\u00e1c h\u00e0m s\u1ed1 sau: L\u1eddi gi\u1ea3i: \u0110\u1eb7t u=1-x2\u00a0th\u00ec du = -3×2\u00a0dx, n\u00ean: \u0110\u1eb7t u=1-x2\u00a0th\u00ec du = -2xdx B\u00e0i 6 (trang 145 sgk Gi\u1ea3i T\u00edch 12 n\u00e2ng cao):\u00a0 D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p l\u1ea5y nguy\u00ean h\u00e0m t\u1eebng ph\u1ea7n, […]<\/p>\n","protected":false},"author":3,"featured_media":23252,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1302],"tags":[1392,1393],"yoast_head":"\n
\u0110\u1ea1i s\u1ed1 - Ch\u01b0\u01a1ng 3 - B\u00e0i 2: M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p t\u00ecm nguy\u00ean h\u00e0m<\/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\/dai-so-chuong-3-bai-2-mot-so-phuong-phap-tim-nguyen-ham\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0110\u1ea1i s\u1ed1 - Ch\u01b0\u01a1ng 3 - B\u00e0i 2: M\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p t\u00ecm nguy\u00ean h\u00e0m\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 5 (trang 145 sgk Gi\u1ea3i T\u00edch 12 n\u00e2ng cao):\u00a0 D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed5i bi\u1ebfn s\u1ed1, t\u00ecm nguy\u00ean h\u00e0m c\u1ee7a c\u00e1c h\u00e0m s\u1ed1 sau: L\u1eddi gi\u1ea3i: \u0110\u1eb7t u=1-x2\u00a0th\u00ec du = -3x2\u00a0dx, n\u00ean: \u0110\u1eb7t u=1-x2\u00a0th\u00ec du = -2xdx B\u00e0i 6 (trang 145 sgk Gi\u1ea3i T\u00edch 12 n\u00e2ng cao):\u00a0 D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p l\u1ea5y nguy\u00ean h\u00e0m t\u1eebng ph\u1ea7n, […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/dai-so-chuong-3-bai-2-mot-so-phuong-phap-tim-nguyen-ham\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - 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