\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n to\u00e1n tr\u01b0\u1eddng THPT Qu\u1ef3nh L\u01b0u 2 l\u1ea7n 1 n\u0103m 2016, tham kh\u1ea3o \u0111\u1ec1 thi d\u01b0\u1edbi \u0111\u00e2y<\/p>\n
C\u00e2u 6: ( 1 \u0111i\u1ec3m ).<\/strong> Cho h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c vu\u00f4ng t\u1ea1i B, c\u1ea1nh AC = 2a, g\u00f3c BAC = 300 <\/sup>, Savu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y v\u00e0 SA = a. T\u00ednh th\u1ec3 t\u00edch kh\u1ed1i ch\u00f3p S.ABC v\u00e0 t\u00ednh kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111\u01b0\u1eddng th\u1eb3ng SB v\u00e0 AC.<\/p>\n C\u00e2u 7: (1 \u0111i\u1ec3m )<\/strong>. Trong kh\u00f4ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9 Oxyz , cho m\u1eb7t c\u1ea7u (S) c\u00f3 ph\u01b0\u01a1ng tr\u00ecnh:<\/p>\n X2 + <\/sup>Y2 \u00a0+ <\/sup>Z2 \u00a0+<\/sup> 2x +2y +4z +3 =0<\/p>\n a, T\u00ecm t\u00e2m v\u00e0 b\u00e1n k\u00ednh \u00a0m\u1eb7t c\u1ea7u (S)<\/p>\n b, l\u1eadp ph\u01b0\u01a1ng tr\u00ecnh m\u1eb7t ph\u1eb3ng (P) \u0111i qua 2 \u0111i\u1ec3m : A( 1,0,1 ); B( -1,1,2 ) v\u00e0 c\u1eaft m\u1eb7t c\u1ea7u (S) theo m\u1ed9t \u0111\u01b0\u1eddng tr\u00f2n c\u00f3 b\u00e1n k\u00ednh l\u1edbn nh\u1ea5t<\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" \u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c gia m\u00f4n to\u00e1n tr\u01b0\u1eddng THPT Qu\u1ef3nh L\u01b0u 2 l\u1ea7n 1 n\u0103m 2016, tham kh\u1ea3o \u0111\u1ec1 thi d\u01b0\u1edbi \u0111\u00e2y C\u00e2u 6: ( 1 \u0111i\u1ec3m ). Cho h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c vu\u00f4ng t\u1ea1i B, c\u1ea1nh AC = 2a, g\u00f3c BAC = 300 , Savu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y v\u00e0 […]<\/p>\n","protected":false},"author":2,"featured_media":713,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[28],"tags":[],"yoast_head":"\n