若 int f(x)dx = sin x + C,则 int xf(1-x^2)dx = ( )A. $2\sin(1-x^2)+ C$B. $-\frac{1
[题目]-|||-若 int f(x)dx=F(x)+C, 则 int f(2x-3)dx= __ .
设 f(2)=4 , (int )_(0)^2f(x)dx=1, 则 (int )_(0)^2xf(x)dx=
int f(x), dx = xe^x + C,则 int f(2x), dx = ( )A. $2xe^{2x} + C$B. $2xe^x + C$C. $
[单选题]若∫f(x)dx=F(x)+C,则∫xf(1-x^2)dx=()。A.F(1-x^2)+CB.-(1/2)F(1-x^2)+CC.(1/2)F(1-x
若f(x)的一个原函数是F(x),则int f(3x-1)dx=()int f(3x-1)dx=()int f(3x-1)dx=()int f(3x-1)dx=
设(x)=dfrac (1)(1+{x)^2}+sqrt (1-{x)^2}(int )_(0)^1f(x)dx, 则 (int )_(0)^1f(x)dx=设
2、设f`(x)为连续函数,则 int (sin )^2xf(cos x)dx-int cos xf(cos x)dx=
求-|||-(1) (int )_(-1)^1f(x)dx;-|||-(2)f(x)dx;-|||-(3) (int )_(3)^-1g(x)dx;-|||-(
B: (Xgt X)=(int )_(-infty )^xf(x)dx-|||-C: (int )_(-infty )^+infty f(x)dx=1 D: (