若关于
的不等式
在
上恒成立,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7209816545cdb03fb8f2222a339b39ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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21-22高三下·河南·阶段练习 查看更多[2]
更新时间:2022-04-21 12:46:30
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【推荐1】已知
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b765ffb2ae5776aef7bf1c34f62b8b.png)
A.![]() | B.![]() |
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【推荐2】设
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bed2bce1381608b8b78da65f1c47fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0593a5b3dd82e528b05647ec7491759.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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困难
(0.15)
名校
【推荐1】已知
在
上恰有两个极值点
,
,且
,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e21a3e5859e60eac5577399568d7885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e73214423aeb0f4150637f757e7ea06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
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【推荐2】已知函数
,若函数
有三个极值点,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e0b57f437f43113870127e266db778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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您最近一年使用:0次
单选题
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困难
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解题方法
【推荐1】已知
,不等式
恒成立,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d3815052a73da51fc087867c0c725c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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困难
(0.15)
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【推荐2】已知函数
,若对于任意的
,均有
成立,则实数a的最小值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc84bf92941ec3655fd282aa9e21e298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddad70792c66dd9e5c9cc6bb2a01d56.png)
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A.![]() | B.1 | C.![]() | D.3 |
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解题方法
【推荐1】已知函数
的定义域为
,其导函数为
,
对
恒成立,且
,则不等式
的解集为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a7a4a037a4dfe973f1eb683d93d799.png)
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【推荐2】已知定义在
上的函数
满足
,且当
时,有
,则不等式
的解集是( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
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