求定积分 (int )_(0)^3dfrac (dx)(x+sqrt {9-{x)^2}} 的值.
(int )_(-3)^3sqrt (9-{x)^2}dx= ． ．
[题目]利用定积分的几何意义,求 (int )_(-3)^3sqrt (9-{x)^2}dx.
∫(;)_(0)^3sqrt(9-(x)^2)dx= ____ ．∫${\;}_{0}^{3}$$\sqrt{9-{x}^{2}}$dx= ____ ．
定积分(int )_(0)^1sqrt (2x-{x)^2}dx=( )(int )_(0)^1sqrt (2x-{x)^2}dx=( )(int )_(0
计算下列定积分：(int )_(0)^sqrt (2)sqrt (2-{x)^2}dx；计算下列定积分：；
定积分(int )_(0)^4dfrac (dx)(1+sqrt {x)}的值是（ ）(int )_(0)^4dfrac (dx)(1+sqrt {x)}(i
求定积分 (int )_(0)^dfrac (pi {2)}sqrt (1-sin 2x)dx的值.求定积分 的值.
求定积分(int )_(1)^sqrt (3)dfrac (1)({x)^2sqrt (1+{x)^2}}dx求定积分
4.计算下列定积分:-|||-(3) (int )_(0)^a(x)^2sqrt ({a)^2-(x)^2}dx(agt 0) :