若存在实数x,y,使得
成立,且对任意a,
,
,则实数t的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb9ac72993d4dd9e7a3ca9cadc0d6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8aff513578c7ff5843fb3363f8c078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cc7d38e2d0479683db66c294a174907.png)
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更新时间:2022-04-24 15:58:42
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【知识点】 基本不等式的恒成立问题解读
相似题推荐
单选题
|
较易
(0.85)
【推荐1】若对
、
,有
恒成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae722974f44c509c813d7a6b2027aaad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
|
较易
(0.85)
解题方法
【推荐2】已知
,
,且
,若不等式
恒成立,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2519954ec2deabecd7e057886fa4023c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd938e7c05317d416daec7a10cd1d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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