已知集合
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9e80a724a8e1ecaab8bab7494faf74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f55ba2923958946b0fc401cad517d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2019-09-28 10:09:10
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容易
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解题方法
【推荐2】已知函数
的定义域是R,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a910169ba1998394f589fc36c58ce1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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