函数<img src=https://huaweicloudobs.ahjxjy.cn/C67FAB5547E09B7194A6A044225C84AC.png title=H@1O1D6TVDUJZ`UI3Y2QN5G.png alt=H@1O1D6TVDUJZ`UI3Y2QN5G.png/>连续是<img src=https://huaweicloudobs.ahjxjy.cn/C67FAB5547E09B7194A6A044225C84AC.png title=H@1O1D6TVDUJZ`UI3Y2QN5G.png alt=H@1O1D6TVDUJZ`UI3Y2QN5G.png/>可导的( )<img src=http://www.ahcjzx.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:\Users\February\AppData\Roaming\Tencent\Users\759939327\QQ\WinTemp\RichOle\H@1O1D6TVDUJZ`UI3Y2QN5G.png style=background:url(http://www.ahcjzx.cn/design/html/js/vender/ueditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd/>