2<\/sub>(x) li\u00ean t\u1ee5c tr\u00ean \u0111o\u1ea1n [a; b] v\u00e0 hai \u0111\u01b0\u1eddng th\u1eb3ng x = a , x = b ( h\u00ecnh 2) th\u00ec di\u1ec7n t\u00edch S \u0111\u01b0\u1ee3c cho b\u1edfi c\u00f4ng th\u1ee9c<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/4-73.png\")
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2. Th\u1ec3 t\u00edch c\u1ee7a m\u1ed9t v\u1eadt<\/b><\/p>\n
M\u1ed9t v\u1eadt th\u1ec3 V \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n b\u1edfi hai m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ho\u00e0nh t\u1ea1i hai \u0111i\u1ec3m c\u00f3 ho\u00e0nh \u0111\u1ed9n x = a , x = b (a \u2264 b) . S(x) l\u00e0 di\u1ec7n t\u00edch thi\u1ebft di\u1ec7n c\u1ee7a V vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c Ox t\u1ea1i x \u2208 [a; b] . Th\u1ec3 t\u00edch V c\u1ee7a v\u1eadt th\u1ec3 V \u0111\u01b0\u1ee3c cho b\u1edfi c\u00f4ng th\u1ee9c:<\/p>\n
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(v\u1edbi S(x) l\u00e0 h\u00e0m s\u1ed1 kh\u00f4ng \u00e2m, li\u00ean t\u1ee5c tr\u00ean \u0111o\u1ea1n )<\/p>\n
3. Th\u1ec3 t\u00edch c\u1ee7a kh\u1ed1i tr\u00f2n xoay<\/b><\/p>\n
Cho h\u00ecnh ph\u1eb3ng \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n b\u1edfi \u0111\u1ed3 th\u1ecb h\u00e0m s\u1ed1 f(x) li\u00ean t\u1ee5c tr\u00ean \u0111o\u1ea1n [a; b] tr\u1ee5c Ox v\u00e0 hai \u0111\u01b0\u1eddng th\u1eb3ng x = a, x = b quay quoanh tr\u1ee5c Ox, ta \u0111\u01b0\u1ee3c kh\u1ed1i tr\u00f2n xoay ( h\u00ecnh 3). Th\u1ec3 t\u00edch Vx<\/sub>\u00a0c\u1ee7a kh\u1ed1i tr\u00f2n xoay n\u00e0y \u0111\u01b0\u1ee3c cho b\u1edfi c\u00f4ng th\u1ee9c:<\/p>\n![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/6-56.png\")
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N\u1ebfu \u0111\u1ed5i vai tr\u00f2 c\u1ee7a x cho y ta \u0111\u01b0\u1ee3c<\/p>\n
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1. Di\u1ec7n t\u00edch h\u00ecnh ph\u1eb3ng N\u1ebfu h\u00ecnh ph\u1eb3ng \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n b\u1edfi \u0111\u1ed3 th\u1ecb c\u1ee7a h\u00e0m s\u1ed1 y = f(x) li\u00ean t\u1ee5c tr\u00ean \u0111o\u1ea1n [a; b] , tr\u1ee5c ho\u00e0nh v\u00e0 hai \u0111\u01b0\u1eddng th\u1eb3ng x = a, x = b ( h\u00ecnh 1) th\u00ec di\u1ec7n t\u00edch S cho b\u1edfi c\u00f4ng th\u1ee9c N\u1ebfu h\u00ecnh ph\u1eb3ng \u0111\u01b0\u1ee3c gi\u1edbi […]<\/p>\n","protected":false},"author":3,"featured_media":26967,"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":"\n
Ch\u01b0\u01a1ng 3 - L\u00fd thuy\u1ebft B\u00e0i 3: \u1ee8ng d\u1ee5ng h\u00ecnh h\u1ecdc c\u1ee7a t\u00edch ph\u00e2n<\/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-3-ly-thuyet-bai-3-ung-dung-hinh-hoc-cua-tich-phan\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 3 - L\u00fd thuy\u1ebft B\u00e0i 3: \u1ee8ng d\u1ee5ng h\u00ecnh h\u1ecdc c\u1ee7a t\u00edch ph\u00e2n\" \/>\n<meta property=\"og:description\" content=\"1. 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