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1 . [选修4-5:不等式选讲]
已知函数
.
(1)当
时,求不等式
的解集;
(2)若不等式
对任意的
恒成立,求
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bde0ac47781edf94c2e9c92a0ef543f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bf0995f32a13d0a9e423f3e88ab271.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0fd755b073d03fcd44e6abb38de1b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb099907c15816b4b329715e80aea70f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2019-03-27更新
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4卷引用:【全国百强校】河北省衡水市第二中学2019届高三上学期期中考试理科数学试题
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2 . 已知函数f(x)=|2x﹣1|+|x+a|,g(x)=x+2.
(1)当a=﹣1时,求不等式f(x)
g(x)的解集:
(2)设
,且当x∈[﹣a,
),f(x)≥g(x),求a的取值范围.
(1)当a=﹣1时,求不等式f(x)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0a974c6dbd1b25e99411faec3732f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
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