... nhiờn S trng hp cú th l C 11 16 5 0.25 16 5 Trong khụng gian vi h ta Vy P (1. 0 im) 0.25 0.25 Cỏc b (a, b, c) m a b c 12 v a b c l (1, 2,9), (1, 3,8), (1, 4,7), (1, 5,6),(2,3,7),(2, 4,6),(3, ... K THI TH THPT QUC GIA LN 1, Ngy 22/3/2 015 P N HNG DN CHM THI MễN TON (Ti Trng THPT Bc Yờn Thnh Ngh An) Cõu (2.0 im) Ni dung a (1. 0 im) Kho sỏt v v th hm s Vi ... cú AB (2,4, 16 ) cựng phng vi a (1, 2, 8) , mp(P) cú PVT n (2, 1, 1) Ta cú [ n ,a] = (6 ;15 ;3) cựng phng vi (2;5 ;1) Phng trỡnh mp cha AB v vuụng gúc vi (P) l 2(x + 1) + 5(y 3) + 1( z + 2) = ...