已知函数
,
为
的导函数,则下列结论正确的个数是__________ .
①当
时,
;
②函数
在
上只有一个零点;
③函数
在
上存在极小值点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80498f8fd2322cef699a982c942fb604.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01d07f3a82196cabb98a2ab98686eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a123fb0d1e61514320edce3ca4e4f86.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a123fb0d1e61514320edce3ca4e4f86.png)
21-22高二·全国·课后作业 查看更多[2]
更新时间:2022-09-07 11:21:06
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