[题目] (int )_(2)^4dfrac (1)(x)dx= __

【题目】-|||-(int )_(0)^4dfrac (1)(1+sqrt {x)}dx.

定积分(int )_(0)^4dfrac (dx)(1+sqrt {x)}的值是（ ）(int )_(0)^4dfrac (dx)(1+sqrt {x)}(i

(4) (int )_(1)^4dfrac (ln x)(sqrt {x)}dx

(8) (int )_(1)^4dfrac (ln x)(sqrt {x)}dx;

(8) (int )_(1)^4dfrac (ln x)(sqrt {x)}dx

【题目】-|||-计算下列定积分:-|||-(12) (int )_(1)^4dfrac (dx)(1+sqrt {x)};

[题目] int dfrac (x)(sqrt {1-{x)^2}}dx

1.求下列定积分.-|||-(1) (int )_(1)^4dfrac (1)(x+sqrt {x)}dx

计算下列定积分: (12) (int )_(1)^4dfrac (dx)(1+sqrt {x)}; 计算下列定积分: (12) ;

[题目] int xcos dfrac (x)(2)dx