数学试题讲解

设

z = x^{y}

, 则有

\frac{\partial z}{\partial x} = x^{y} \ln x

\frac{\partial z}{\partial x} = y x^{j - 1} d x

\frac{\partial z}{\partial x} = x^{y}

\frac{\partial z}{\partial x} = y x^{j - 1}