<p>设隐函数z（x,y）由方程x+2y+z＝2<img src="https://learnfile.20230611.cn/learnAppQuestion/4d/79/4d79e1103509e7baf2b58dc8d105dc1a.jpg" style="width: 100%;height: auto;">所确定，求<img src="https://learnfile.20230611.cn/learnAppQuestion/13/91/13912f2814a14c40aed748d