<p>已知函数<img src="https://learnfile.20230611.cn/learnAppQuestion/f8/fb/f8fb277d2d4a0ae9913c961aec35ad9c.png" style="width: 100%;height: auto;">在点<img src="https://learnfile.20230611.cn/learnAppQuestion/4d/62/4d623fb764d3641596272095070c76ab.png" style