已知函数
,若
,则实数
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c435f6955dfdf996ba27e551205bf5fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5900fde226fe1d04de2e164112337336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2020·全国·模拟预测 查看更多[2]
更新时间:2021-01-13 13:45:47
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,且
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