选修4-5:不等式选讲
设
.
(1)求
的解集;
(2)若不等式
对任意实数
恒成立,求实数
的取值范围.
设
![](https://img.xkw.com/dksih/QBM/2016/11/15/1573147881881600/1573147888132096/STEM/8726f7a92124436296412fbc1baa8a0b.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/11/15/1573147881881600/1573147888132096/STEM/b3755949b725477c90a6576b101ac63d.png)
(2)若不等式
![](https://img.xkw.com/dksih/QBM/2016/11/15/1573147881881600/1573147888132096/STEM/d0c9a305aa06495c95a0b6ceec60b79e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/15/1573147881881600/1573147888132096/STEM/2366eb8dd59c4190ba8f2042d3604e3d.png)
![](https://img.xkw.com/dksih/QBM/2016/11/15/1573147881881600/1573147888132096/STEM/4ae38120613845128945d59232d770e2.png)
更新时间:2016-12-05 00:40:28
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【推荐2】设a为实数,函数
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【推荐1】选修4-5:不等式选讲
已知函数
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(1)若当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579fba406f30efe7ebd1d31693c222a6.png)
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(1)若当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199eb64f29eba21835f6ccdb509c1622.png)
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(2)若当
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适中
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【推荐2】选修4-5:不等式选讲
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e492f99249ff3e42e725e81ce8355d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6c86deb114585729f72fb2c92f8e2c.png)
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