<p>求极限<img src="https://learnfile.20230611.cn/learnAppQuestion/c2/2b/c22b8933802c422b56da78aca364a420.jpg" style="width: 100%;height: auto;"><img src="https://learnfile.20230611.cn/learnAppQuestion/67/14/6714435ebb9cc091be121e586e16948b.jpg" style="w