1/20 单选题（5分） （）.I=int_(-1)^1x^2(1+sin^3x)dx=

I=int_(-1)^1x^2(1+sin^3x)dx=A. -1B. 1C. $\frac{1}{3}$D. $\frac{2}{3}$

I=int_(-1)^1x^2(1+sin^3x)dx=A. -1B. 1C. $\frac{1}{3}$D. $\frac{2}{3}$

(int )_(-1)^1dfrac (1+sin x)(1+{x)^2}dx .

设int_(-1)^13f(x)dx=18，int_(-1)^3f(x)dx=4，int_(-1)^3g(x)dx=3。则int_(-1)^3(1)/(5)[4

(d)/(dx)int_(1)^x^(2)sin tdt= （ ）A. 2xsin x²B. sint²C. sin x²D. 2tsint²

计算int dfrac (dx)(cos x(1+sin x))计算

(d)/(dx) int_(1)^x x ln (x^2 + 1) , dx = $\frac{d}{dx} \int_{1}^{x} x \ln (x^2 +

计算不定积分int dfrac (x)(1+sin x)dx计算不定积分

24.[填空题]int_(-1)^1x^2sin xdx=____24.[填空题]$\int_{-1}^{1}x^{2}\sin xdx=$____

int_(0)^2(1)/(1+sqrt[3](x))dx;$\int_{0}^{2}\frac{1}{1+\sqrt[3]{x}}dx;$