选修4-5:不等式选讲
已知函数
,
.
(1)当
时,解不等式
;
(2)当
时,
恒成立,求
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743570a5e44dcea6a7a04e7796fda136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4509817be39bef4bcde115996ee39e8.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ada1ccce7a29845fe2f77cf916f9f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a62f9785ee9772a4baabc362200f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2016-12-04 18:20:02
|
【知识点】 绝对值不等式
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
.
(1)求不等式
的解集;
(2)若
的最小值为
,正数
满足
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8f44fc4cef4cfb5de9e4b9246fa38d.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c48fd75ab50ea3e23bb1a335cfcb49.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c321b3d7476442ac8aabc81a553a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c130b1562ebd2eb3779865113f3a420.png)
您最近一年使用:0次
解答题
|
适中
(0.65)
【推荐2】选修4-5:不等式选讲
已知函数
,
.
(1)求不等式
的解集;
(2)求函数
的单调区间与最值.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3467a1b670455e2fe5be04fa03546c75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3dd387c8629276a7c133f965e8f5574.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7885f434c8b2e27da70c55c806b2a86.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5b1906262e49b75a006dabae9e5a50.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】已知函数
.
(1)求不等式
的解集;
(2)若
的最小值为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6011d17841a8704f20485be69e40562c.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db11a38505d6e43e1954c913916adb4e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bc6a786744b710c475dc9c847c4bd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3dbc423decbb04b2b09d5a7e493838.png)
您最近一年使用:0次