<p>设z=<img src="https://learnfile.20230611.cn/learnAppQuestion/7d/b1/7db14c87a361c2ea23f46cd237762a0c.jpg" style="width: 100%;height: auto;">,则<img src="https://learnfile.20230611.cn/learnAppQuestion/87/27/8727cc51dd32e57acd4ae6953815b30a.jpg" style=