41)int(dx)/(1+sqrt(1-x^2));

不定积分int dfrac (1)(1+sqrt {1-x)}dx=( ) int dfrac (1)(1+sqrt {1-x)}dx=int dfrac (

不定积分int dfrac (1)(1+sqrt {x)}dx= __ 。（） int dfrac (1)(1+sqrt {x)}dx= __ 。

(int )_(1)^2dfrac (dx)(x(1+sqrt {2x))}=( )A.(int )_(1)^2dfrac (dx)(x(1+sqrt {2x

(1) int dfrac (dx)(1+sqrt {1-{x)^2}} ,

(6) int_((1)/(sqrt(2)))^1(sqrt(1-x^2))/(x^2)dx;(6) $\int_{\frac{1}{\sqrt{2}}}^{1

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

(6) int dfrac (dx)(1+sqrt {1-{x)^2}} ;

(25) int dfrac (1)(1+sqrt {1-{x)^2}}dx ;

40) int dfrac (dx)(1+sqrt {2x)} ,

(40 ) int dfrac (dx)(1+sqrt {2x)};