z=e^(xy)*(x+y),则δz/δx等于多少

Question

z=e^(xy)*(x+y),则δz/δx等于多少

Answer 1

把y看做常数
∂z/∂x
=e^(xy)*y*(x+y)+e^(xy)*1
=e^(xy)*(xy+y²+1)