设函数
,若存在唯一的正整数
,使得
,则
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d492f8ae5584887d58f915da39df950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92755ed40510a358dcb77392749fd792.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-08-27 10:16:52
|
【知识点】 利用导数研究能成立问题
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