求由Z=Y^2,X^2+Y^2=1,Z=0所围成立体的体积!好像是用二重积分做的

设函数z=z(x,y),由方程z=e^(2x-3z)+2y确定,求∂z/∂x,∂z/∂y 设函数z=z(x,y)由方程x^2+y^3-xyz^1=0确定,求z/x,z/y 设函数z=z(x,y)由方程e^(-xy)-2z+e^z=0确定,求z/x,z/y 设由方程x+2y+z=e^(x-y-z)确定的隐函数为z=z(x,y),求d^2z/dx^2 已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 已知：x^2/(z+y)+y^2/(x+z)+z^2/(x+y)=0,求x/(z+y)+y/(x+z)+z/(x+y)的值. x^2/(z+y)+y^2/(x+z)+z^2/(x+y)=0,求x/(z+y)+y/(x+z)+z/(x+y)的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值 求Y(Z)=Z(Z+2)/(3Z-7)(Z+1)的z反变换 2|X-Y|+√2Y+Z+Z²-Z+1/4=0求X+Y+Z的值 设z=z(x,y)由yz+x^2+z=0确定,求dz(x,y) 如果,根号x-3+| y-2 |+z^2=2z-1 求 （x+z)^y 设z=z(x,y)是由方程e^(-xy)+2z-e^z=2确定 求dz|(x=2,y=-1/2) 设z=z(x,y)是由方程e^(-xy)+2z-e^z=2确定 求dz|(x=2,y=-1/2) x+2y=3x+2z=4y+z 求x:y:z (x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z