解题方法
1 . 已知函数
.
(1)当
时,求不等式
的解集;
(2)若不等式
对任意的实数
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54ada75372ff0726d009ad3252afc75.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82920c98445912b7ad48a6a5275bd8bb.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fc1cd2baabbf8afea25478e1258237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2019-07-04更新
|
374次组卷
|
2卷引用:湖北省天门市、仙桃市、潜江市2018-2019学年高二下学期期末数学(理)试题
2 . 选修4-5:不等式选讲
设函数
.
(Ⅰ)若不等式
的解集是
,求实数
的值;
(Ⅱ)若
对一切
恒成立,求实数
的取值范围.
设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd0d44cf3f5623ab445b65aa91bd9ea.png)
(Ⅰ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb55d76601bc0b44a2b22b77edf482f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac3590c768573ffcf7a9004aa0f71dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15bd315b801f71bc30b8d772098614.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a246efd9c0f6b3a3da3edb223078d90b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f1a3feca6218955446108ebad0a524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
3 . 设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6257bb57877ae0a9291d8e2243c715.png)
(Ⅰ)若不等式
的解集是
,求实数
的值;
(Ⅱ)若
对一切
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e6257bb57877ae0a9291d8e2243c715.png)
(Ⅰ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb55d76601bc0b44a2b22b77edf482f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe081d91e5d50930a2837693c261e0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15bd315b801f71bc30b8d772098614.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a246efd9c0f6b3a3da3edb223078d90b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f1a3feca6218955446108ebad0a524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次