已知函数
,若
存在唯一的零点,则k的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75544f8e5ed68ba04863c3a5f9e7541f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
更新时间:2024-03-26 22:44:04
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【知识点】 利用导数研究函数的零点
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