已知函数
(其中
为自然对数的底数)存在唯一的极值点,则实数
的取值范围是____________________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dacbfd0f2030389b52b9eeda798ee63e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2019-05-23 16:17:05
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【知识点】 函数单调性、极值与最值的综合应用
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