2020高三上·广东·专题练习
解题方法
1 . 已知关于
的不等式
的解集为
.
(1)当
时,求
的最小值;
(2)当
时,函数
的图象恒在直线
的上方,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6dcb70becb5267f0ca9890064b47fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cf818dd484cc4cebd40a5f28eb8e9f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70be4f6136b0b0d4ba1a4a810d511cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c747cc83c67dc59bb6baab70c8dc1dbc.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f0ca536621ec8db02707ba65917029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f9bd7fdb0c44b5e2e1d5a59dd6f7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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