名校
解题方法
1 . 已知函数
.
(1)若不等式
的解集为
,求不等式
的解集;
(2)若对于任意
,不等式
恒成立,求实数
的取值范围;
(3)已知
,当
时,若对任意
,总存在
,使
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e61bb6ad2b732c72e2a3ac9c6e8c57a.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9210e75c35fb455d0446eb7ddba7d79c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e66e00bb4931297b97b94010adc89a.png)
(2)若对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f0ca536621ec8db02707ba65917029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c14a0d8284c582b0ba24cada6ac40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33919691c4f285ce0f5887755285a633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8e1dd8da540badcb9a8f427c5b202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/204687ff0d957eece42db00f067f15a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ab17ae885efcd793ad07f5b45b778b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2022-10-13更新
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7卷引用:第06讲 拓展二:利用导数研究不等式能成立(有解)问题-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第二册)