函数z=exy求二阶偏导数zxy和zyy

Question

如题所述

Answer 1

z =e^(xy)
∂z/∂x = ye^(xy)
∂^2z/∂x∂y =(1+ xy). e^(xy)

z =e^(xy)
∂z/∂y = xe^(xy)
∂^2z/∂y^2 = x^2.e^(xy)本回答被网友采纳