求定积分 (int )_(0)^3dfrac (dx)(x+sqrt {9-{x)^2}} 的值.

定积分int_0^3(sqrt(9-{x^2))}dx的值为 ____ ．定积分$\int_0^3$${\sqrt{9-{x^2}}}$dx的值为 ____ ．

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

求定积分(int )_(1)^sqrt (3)dfrac (1)({x)^2sqrt (1+{x)^2}}dx求定积分

[题目]利用定积分的几何意义,求 (int )_(-3)^3sqrt (9-{x)^2}dx.

求定积分 (int )_(0)^dfrac (pi {2)}sqrt (1-sin 2x)dx的值.求定积分 的值.

求下列定积分:-|||-(10) (int )_(1)^sqrt (3)dfrac (dx)({x)^2sqrt (1+{x)^2}}

设 gt 0, 求 (int )_(-a)^asqrt ({a)^2-(x)^2}ln dfrac (x+sqrt {1+{x)^2}}(3)dx,

求下列定积分:-|||-(int )_(dfrac {sqrt {2)}(2)}^1dfrac (sqrt {1-{x)^2}}({x)^2}dx

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

求不定积分int dfrac (1)(2x)sqrt (ln x)dx=（）.int dfrac (1)(2x)sqrt (ln x)dx=int dfrac