<p>求极限<img src="https://learnfile.20230611.cn/learnAppQuestion/c8/93/c893ad1656a6d45355aeac1639a71b73.jpg" style="width: 100%;height: auto;">的导数<img src="https://learnfile.20230611.cn/learnAppQuestion/5d/49/5d49196e5e1514c8c5c5db5693a01c53.jpg" style