(int )_(-3)^3sqrt (9-{x)^2}dx= ．

∫(;)_(0)^3sqrt(9-(x)^2)dx= ____ ．∫${\;}_{0}^{3}$$\sqrt{9-{x}^{2}}$dx= ____ ．

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

(1) int dfrac (3sqrt {x)}(x(sqrt {x)+sqrt [3](x))}dx

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 ____ ．

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

(9) int (e)^sqrt [3](x)dx;

(3) int_(4)^9 sqrt(x)(1+sqrt(x))dx;(3) $\int_{4}^{9} \sqrt{x}(1+\sqrt{x})dx;$

求下列不定积分(1)int sqrt [5]({(3-5x))^3}dx(2)int sqrt [5]({(3-5x))^3}dx(3)int sqrt [5]

(3) int dfrac (x)(sqrt {2-3{x)^2}}dx;

int (e)^sqrt (3x+9)dx.