Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n To\u00e1n<\/p>\n<\/div>\n
C\u00e2u 6 (1,0 \u0111i\u1ec3m).<\/strong><\/p>\n Trong kh\u00f4ng gian Oxyz cho \u0111i\u1ec3m A(3; -2; -2) v\u00e0 m\u1eb7t ph\u1eb3ng (P): x – y – z + 1 = 0.<\/p>\n a) Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t c\u1ea7u (S) c\u00f3 t\u00e2m A v\u00e0 ti\u1ebfp x\u00fac v\u1edbi mp (P).<\/p>\n b) Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t ph\u1eb3ng (Q) \u0111i qua A, vu\u00f4ng g\u00f3c v\u1edbi mp (P) bi\u1ebft r\u1eb1ng mp (Q) c\u1eaft hai tr\u1ee5c Oy, Oz l\u1ea7n l\u01b0\u1ee3t t\u1ea1i \u0111i\u1ec3m ph\u00e2n bi\u1ec7t M v\u00e0 N sao cho OM = ON. <\/p>\n C\u00e2u 7 (1,0 \u0111i\u1ec3m).<\/strong>Cho h\u00ecnh l\u0103ng tr\u1ee5 ABC.A\u2019B\u2019C\u2019 c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u00f3 c\u1ea1nh b\u1eb1ng a, c\u1ea1nh b\u00ean t\u1ea1o v\u1edbi \u0111\u00e1y g\u00f3c 30<\/p>\n . Bi\u1ebft h\u00ecnh chi\u1ebfu vu\u00f4ng g\u00f3c c\u1ee7a A\u2019 tr\u00ean (ABC) tr\u00f9ng v\u1edbi trung \u0111i\u1ec3m c\u1ea1nh BC. T\u00ednh theo a th\u1ec3 t\u00edch kh\u1ed1i l\u0103ng tr\u1ee5 ABC.A\u2019B\u2019C\u2019 v\u00e0 b\u00e1n k\u00ednh m\u1eb7t c\u1ea7u ngo\u1ea1i ti\u1ebfp t\u1ee9 di\u1ec7n A\u2019ABC.<\/p>\n <\/p>\n <\/p>\n<\/p>\n T\u1ea5t c\u1ea3 n\u1ed9i dung b\u00e0i vi\u1ebft. C\u00e1c em h\u00e3y xem th\u00eam v\u00e0 t\u1ea3i file chi ti\u1ebft t\u1ea1i \u0111\u00e2y:<\/strong>Download<\/p>\n","protected":false},"excerpt":{"rendered":" \u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n To\u00e1n – THPT H\u1ed3ng L\u0129nh, t\u1ec9nh H\u00e0 T\u0129nh n\u0103m 2016, c\u00e1c em tham kh\u1ea3o d\u01b0\u1edbi \u0111\u00e2y: Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n To\u00e1n C\u00e2u 6 (1,0 \u0111i\u1ec3m). Trong kh\u00f4ng gian Oxyz cho \u0111i\u1ec3m A(3; -2; -2) v\u00e0 m\u1eb7t ph\u1eb3ng (P): x – y […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[28],"tags":[],"yoast_head":"\n\u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n To\u00e1n – THPT H\u1ed3ng L\u0129nh n\u0103m 2016<\/h3>\n