1 . 选修4﹣5:不等式选讲
已知f(x)=|ax+1|(a∈R),不等式f(x)≤3的解集为{x|﹣2≤x≤1}.
(Ⅰ)求a的值;
(Ⅱ)若
恒成立,求k的取值范围.
已知f(x)=|ax+1|(a∈R),不等式f(x)≤3的解集为{x|﹣2≤x≤1}.
(Ⅰ)求a的值;
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2016/4/19/1572596167262208/1572596173455360/STEM/efae6cf3afe14ed49ca8708f7b32baca.png)
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2 . 设函数
.
(1)若
,
,证明:
;
(2)若
,求a的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/321b707a16da47e993b1610d71906aff.png)
(1)若
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/20c2240065a6498690addf4a22d4dbd9.png)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/1f03e7ed0cf24c27a12273950183af9a.png)
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/733bcb579876403a990aaeb93e8b341d.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2015/12/24/1572393092431872/1572393098698752/STEM/caef1d3d5ccd41628d241c5cdcd5b97f.png)
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3 . 已知函数
.
(1)当
时,求函数
的定义域;
(2)若关于
的不等式
的解集是
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74b1a7d32707c61a3c3451ab7458153.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f34365e5040ce6944115c8da61bf110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daca8f97e33229f87a339d2d0584d2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2016-12-02更新
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1112次组卷
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2卷引用:福建省闽侯第六中学2018届高三上学期第一次月考数学(文)试题