<p>若函数<img src="https://learnfile.20230611.cn/learnAppQuestion/87/04/8704c7ce081d3568e82f29be4ba6ef77.jpg" style="width: 100%;height: auto;">在点<img src="https://learnfile.20230611.cn/learnAppQuestion/2b/98/2b987b50ace67e3a4948ca3a6f71fe53.jpg" style=