当
,函数
的值域为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f0ca536621ec8db02707ba65917029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce06333e0222b19671814e46146202a.png)
更新时间:2022-06-10 23:10:02
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【知识点】 利用函数单调性求最值或值域解读
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解题方法
【推荐1】已知函数
,若
,
,
,则实数
的取值范围是 ____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb282fb5d1a04a6d594a9927c51a4ade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f26ccf6a3402a01a98cfa60218a2be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3737e43b7eb3dd44dfd22c715a0c97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29f5020d133f458912dc3da22b8127d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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