z=3x^3y^2,求dz
z=(2y+7)^2 * ln(x^3+2) 求dz/dx 和 dz/dy
若z=e^(x^2+y^3),求dz/dx,dz/dy
设有方程x+y^2+z^2=2z,求dz/dx dz/dy
设Z=f(x^2 +y,2xy),求dz/dx和dz/dy
设函数z=sin(x^2y^2)+3x-5y^2+1,求dz
设z=ln(x^z×y^x),求dz
设x+y^2+z=ln(x+y^2+z)^1/2,求dz/dx
1.x/z=e^y+z,求dz.
设二元函数 z=u^2,u=x+y v=x-y ,求dz/dx,dz/dy
求函数:z^x=y^z的,dz/dx,dz/dy,
设函数z=z(x,y)由方程x∧2z∧3+2y∧2z∧2-x∧2+y∧3=0所确定,求dz
设z=x^2+y^3,则全微分dz=?