设函数
,其中,
表示
、
、
中的最小者.若
,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2326459494e4e75c818ff8f570d9f65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ef25cf4dcf2e053057ceb3a16e23ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bba2ee177dfb440e561621b37daf34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2018-12-06 21:21:33
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【知识点】 函数与映射