已知函数
.
(1)当
时,解不等式
;
(2)若关于
的不等式
在
上恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad90f8a32736bc7fd0cf7b499e176c5.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188281cc0c7af6e95c32b9bbb94ffc21.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5c3fc6b3df553edbe4d0afe4e6e621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2021-12-09 18:51:58
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适中
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名校
【推荐1】设函数
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(1)解不等式
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(2)设
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(1)解不等式
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(2)设
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【推荐2】选修4-5:不等式选讲
已知函数
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(1)解不等式
;
(2)若对任意
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,使得
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的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45fd98ff63f2fd2c20fa3852f67522bd.png)
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(1)解不等式
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(2)若对任意
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ba8542fbe02e78cf3948c9abea9855.png)
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解题方法
【推荐1】已知函数
.
(Ⅰ)解关于
的不等式
;
(Ⅱ)若
,
的解集非空,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e980c3a147bdccef4f5165bad2d41c9.png)
(Ⅰ)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098503fedbe70c2aac50fdb25eda8125.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c62db19f1de0001b3ef3e5a3a3ed57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42740d8f095b5f7825d14c4c312096.png)
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【推荐2】已知函数
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(Ⅰ)当
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(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaebfdf16b729b9c4699d61ed0522ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
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适中
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【推荐1】已知函数
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(1)当
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(2)当
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名校
【推荐2】已知函数
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