1 . 若
时,关于
的不等式
恒成立,则正整数
的取值集合为__________ .(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38299a75fc685df99b6c5b6f3e3fab68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519b1a844425f04f4e473ff8e9fda07d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07c131929b3ddc3ae64bed5352240f6.png)
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解题方法
2 . 已知
的定义域为R,若函数满足
,则称
为
的一个不动点,有下列结论:①
的不动点是3;②
存在不动点;③若函数
为奇函数,则其存在奇数个不动点;若
为偶函数,则其存在偶数个不动点;④若
为周期函数,则其存在无数个不动点;⑤若
存在不动点,则
也存在不动点,以上结论正确的序号是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bc955d158efde0bdd62d14a60a65e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0994abea110f5e3f04302268eaa5b4db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a903745cd2cb536443d07579b606ece5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e56e3224d58e0cfd256493f3fc63df.png)
您最近一年使用:0次
2022高三·全国·专题练习
解题方法
3 . 完成下列各问
(1)已知函数
,若
恒成立,则实数a的取值范围是_______ ;
(2)已知函数
,若
恒成立,则正数a的取值范围是_______ ;
(3)已知函数
,若
恒成立,则正数a的取值范围是_______ ;
(4)已知不等式
对任意正数x恒成立,则实数a的取值范围是_______ ;
(5)已知函数
,其中
,若
恒成立,则实数a与b的大小关系是_______ ;
(6)已知函数
,若
恒成立,则实数a的取值范围是_______ ;
(7)已知函数
,若
恒成立,则实数a的取值范围是_______ ;
(8)已知不等式
,对
恒成立,则k的最大值为_______ ;
(9)若
,则实数a的取值范围是_______ ;
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a4b3e312f79ba2da89b12276b5c56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3417699eb4a32521b7ff1f7b2a1d5f47.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ed6a514638124308b9f34f9275eee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3417699eb4a32521b7ff1f7b2a1d5f47.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d6705983cc8540162f9d8650772035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3417699eb4a32521b7ff1f7b2a1d5f47.png)
(4)已知不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12af841c451108c480e0d952bc216130.png)
(5)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98cb76a60bb927baa6ee6286dee8fbda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3417699eb4a32521b7ff1f7b2a1d5f47.png)
(6)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c124a9162a22713bd5691b233a055831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3417699eb4a32521b7ff1f7b2a1d5f47.png)
(7)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d3d3a02b6f82bd084fbc64c96c466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3417699eb4a32521b7ff1f7b2a1d5f47.png)
(8)已知不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7599b04f3abd50973cf490d20c781046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda7b27271ac0387b65bc53cacd89a16.png)
(9)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aec7c8945ea257f5d2d6fb097104000.png)
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解题方法
4 . 当x≠0时,函数f(x)满足
,写出一个满足条件的函数解析式f(x)=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2f0c7631818f89304d644efa9fc6d6.png)
您最近一年使用:0次