z=arctan(xy),而y=e^x,求dz/dy
z=x*arctan(xy),求(dz/dx)|(1,1),(dz/dy)|(1,1)
设z=arctan(xy),y=e的x次方,求dz/dx
偏导数 .急 设z=(e^u)sinv 而u=xy ,v=x+y 求 dz/dx,dz/dy
设Z=f(x^2 +y,2xy),求dz/dx和dz/dy
高数设z=f(e^xy,y/x),求dz
设函数z=f(x,y)由方程e^z=xyz+cos(xy)求dz/dx ,dz/dy.求详解
若z=e^(x^2+y^3),求dz/dx,dz/dy
设z=u^2cosv^2,u=x+y,v=xy,求dz/dx,dz/dy.
微分方程(首次积分)已知dx/(e^x+z)=dy/(e^y+z)=dz/(z^2-e^(x+y)),求x,y,z的关系
设有方程x+y^2+z^2=2z,求dz/dx dz/dy
求函数:z^x=y^z的,dz/dx,dz/dy,
1,y=e^tanxcos^3x,求dy 2,函数y=y(x)由方程e^(x+y)+arctan(xy)=0确定,求dy