设z=sin(xy^2)求∂^2z/∂x∂y

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设z=sin(xy^2)求∂^2z/∂x∂y设z=sin(xy^2)求∂^2z/∂x∂y设z=sin(xy^2)求∂

设z=sin(xy^2)求∂^2z/∂x∂y
设z=sin(xy^2)求∂^2z/∂x∂y

设z=sin(xy^2)求∂^2z/∂x∂y
2ycosxy^2-xy^2sinxy^2