... P N THANG IM Mụn thi: TON; khi: D Cõu ỏp ỏn I (1,0 im) (2,0 im) Khi m = hm s cú dng y = x + x + Tp xỏc nh: D = R S bin thi n: - Chiu bin thi n: y ' = x3 + x , y ' = x3 + ... (; 0) - Cc tr: + Hm s t cc tiu ti x = v yCT = y(0) = lim = +, lim = + - Gii hn: x x + Bng bin thi n: + x y(x) y(x) + + im 0,25 0,25 + 0,25 th: i qua cỏc im (1; 4) v nhn trc Oy lm trc i xng ... e x dx e +9 dt t - 0,25 dt t = ln +C t t +3 0,25 e2x + ln +C e2x + + IV (1,0 im) 0,25 Theo gi thit: ( SAB ) ^ ( ABCD) theo giao tuyn AB Do ú nu k SH ^ AB ti H thỡ SH ^ ( ABCD) SA2 + SB = AB...