Xem th\u00eam: \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n To\u00e1n<\/p>\n<\/div>\n
C\u00e2u 7(1,0\u0111i\u1ec3m<\/em>) <\/strong>Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt v\u1edbi AB = 2a, AD = a\u221a3 . M\u1eb7t b\u00ean SAB l\u00e0 tam gi\u00e1c c\u00e2n t\u1ea1i S v\u00e0 n\u1eb1m trong m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t \u0111\u00e1y. Bi\u1ebft \u0111\u01b0\u1eddng th\u1eb3ng SD t\u1ea1o v\u1edbi m\u1eb7t \u0111\u00e1y m\u1ed9t g\u00f3c 45<\/p>\n . T\u00ednh th\u1ec3 t\u00edch c\u1ee7a kh\u1ed1i ch\u00f3p S.ABCD v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111\u01b0\u1eddng th\u1eb3ng SA v\u00e0 BD.<\/p>\n C\u00e2u 8 (1,0 \u0111i\u1ec3m<\/em> )<\/strong> Trong m\u1eb7t ph\u1eb3ng v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 Oxy, cho h\u00ecnh ch\u1eef nh\u1eadt ABCD c\u00f3 t\u00e2m I(1;3). G\u1ecdi N l\u00e0 \u0111i\u1ec3m thu\u1ed9c c\u1ea1nh AB sao cho AN = 2\/3AB. Bi\u1ebft \u0111\u01b0\u1eddng th\u1eb3ng DN c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh x+y-2=0 v\u00e0 AB=3AD. T\u00ecm t\u1ecda \u0111\u1ed9 \u0111i\u1ec3m B.<\/p>\n <\/p>\n <\/p>\n <\/em><\/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 n\u0103m 2016 – THPT B\u1ed1 H\u1ea1, 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 7(1,0\u0111i\u1ec3m) Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt v\u1edbi AB = 2a, AD = a\u221a3 . M\u1eb7t b\u00ean SAB […]<\/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 n\u0103m 2016 – THPT B\u1ed1 H\u1ea1 <\/h3>\n