把下列积分化为极坐标形式, 并计算积分值: (3)(int )_(0)^1dx(int )_({x)^2}(({x)^2+(y)^2)}^-dfrac (1{2)}dy;

把下列积分化为极坐标形式, 并计算积分值: (2)(int )_(0)^adx(int )_(0)^xsqrt ({x)^2+(y)^2}dy;

12.化下列二次积分为极坐标形式的二次积分:-|||-(1) (int )_(0)^1dx(int )_(0)^1f(x,y)dy;-|||-(2) (int

计算(int )_(0)^1dx(int )_(1-x)^sqrt (1-{x^2)}dfrac (x+y)({x)^2+(y)^2}dy=-|||-dv=__

在下列积分中改变累次积分的顺序:-|||-(1) (int )_(0)^2dx(int )_({x)^2x}f(x,y)dy;-|||-(2) (int )_(

12.化下列二次积分为极坐标形式的二次积分:-|||-(3) (int )_(0)^1dx(int )_(1-x)^sqrt (1-{x^2)}f(x,y)dy

(int )_(0)^1dx(int )_(x)^1(e)^-(y^2)dy= () .-|||-

[例5] 积分 (int )_(0)^2dx(int )_(0)^sqrt (2x-{x^2)}sqrt ({x)^2+(y)^2}dy= __

求指导本题解题过程，谢谢您！28化二次积分 =(int )_(0)^1dx(int )_(0)^xf(sqrt ({x)^2+(y)^2})dy 为极坐标下的二

计算积分(int )_(dfrac {1)(2)}^dfrac (3{2)}dfrac (dx)(sqrt {|x-{x)^2|}}.(本题满分6分)计算积分.

计算下列二重积分:-|||-(int )_(0)^1(x)^5dx(int )_({x)^2}^1(e)^-(y^2)dy