若函数在点处可导，且则当时，必有（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/d0407536dfe3460c9a4f7bb4ee34ca86.png
举一反三
- 设在x=a处可导，则（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/160796dfa5d04867841f1cd369811906.png
- 设且二阶可导，则. （ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/0e94e70d6f8040c4a8fd7d52db3c793f.png
- 在处左可导且右可导是在处可导的（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/51657f25976d46718cd61c33ef680335.png
- 设函数连续，且，则（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/fa98ba79c8b04f47adca4a3f7d4d2c9b.png
- 若，则（ ）https://image.zhihuishu.com/zhs/onlineexam/ueditor/201911/72bcab7a9a534faf8d3f5d65db5dd498.png