Posted by haifeng on 2023-03-29 13:16:42 last update 2023-03-29 13:16:42 | Answers (2) | 收藏
设 $2\sin(x+2y-3z)=x+2y-3z$, 证明: $\frac{\partial z}{\partial x}+\frac{\partial z}{\partial y}=1$.
