设z=arctan(xy),y=e^x ,求dz/dx ．

设z=arctan(xy),y=e的x次方,求dz/dx z=x*arctan(xy),求(dz/dx)|(1,1),(dz/dy)|(1,1) 设Z=f(x^2 +y,2xy),求dz/dx和dz/dy 设函数z=f(x,y)由方程e^z=xyz+cos(xy)求dz/dx ,dz/dy.求详解 偏导数 .急 设z=(e^u)sinv 而u=xy ,v=x+y 求 dz/dx,dz/dy 设z=u^2cosv^2,u=x+y,v=xy,求dz/dx,dz/dy. 高数设z=f(e^xy,y/x),求dz 若z=e^（x^2+y^3）,求dz/dx,dz/dy 设x+y^2+z=ln(x+y^2+z)^1/2,求dz/dx 设方程xz+yz+xy=e的定函数z=z(x,y),求dz 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f(x,y)具有一阶连续偏导数,z=xf(x^y,e^xy),求dz