Question

x三次方y-3xy平方+e的x-y次方 求全微分

Answer 1

已知z=x³y-3xy²+e^(x-y),求全微分

dz=(∂z/∂x)dx+(∂z/∂y)dy

=[3x²y-3y²+e^(x-y)]dx+[x³-6xy-e^(x-y)]dy