求Z=(x^2+y^2)e^[(x^2+y^2)/xy]的偏导数.

设函数z=z(x,y),由方程z=e^(2x-3z)+2y确定,求∂z/∂x,∂z/∂y 微积分...设z=z(x,y)是方程^2+y^2+z^2=y*e^z确定的隐函数,求dz.2x/(y*e^z-2z) dx + 2y/(y*e^z-2z) dy 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 设z=(x+2y)e^xy,求dz z=(e^3y) +(x^2)Xsiny,求dz xz+xy^2=e^z 求&z/&x ,&z/&y 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(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z 设方程x+2y+z=e^(x-y-z),确定隐函数z=z(x,y),求对xy的二级偏导. z=y^3*e^x+x^3*y^2,求a^2*z/a*x^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) 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=f(x^2-y^2,e^（xy)),求偏导z/x,偏导z/y 求以下三题的一阶偏导数,Z=ln（x+y^2）-y z=e^[(xy)^3] z=x+y/x-y x+2y=3x+2z=4y+z 求x:y:z 设e²-x+y+2=0,确定z是x,y函数,求∂z/∂x及∂z/∂y求完整步骤.