选修4-5:不等式选讲
已知函数
,不等式
的解集为
.
(1)求实数
的值;
(2)若
对一切实数
恒成立,求实数
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10905f5554f6d0b46a902f8bf722ceba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a9f7884d2a1a1f304d8d468d8dd47c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0d79d967291b4e7af000148de99323.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6da12777dc737fe63740871031bc18d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2016-10-04 16:26:54
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【知识点】 绝对值不等式
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】选修4—5:不等式选讲
设不等式
的解集为
,
.
(1)证明:
;
(2)比较
与
的大小.
设不等式
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974317051904/1572974323245056/STEM/a7e38fe3eeaa42aa99e8703ae64b0db7.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974317051904/1572974323245056/STEM/9cfd360967224ede95f56c125c3e7922.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974317051904/1572974323245056/STEM/f5a3b43d0d324725956bbac6893111ea.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974317051904/1572974323245056/STEM/3d86906543a44b908951d89fa598bc1a.png)
(2)比较
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974317051904/1572974323245056/STEM/dc3a54b20fe247b4822df21c4b30e240.png)
![](https://img.xkw.com/dksih/QBM/2016/8/11/1572974317051904/1572974323245056/STEM/4bfe5b8ae5c84928829c9838002d1718.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】已知定义在R上的函数f(x)=|x+1|+|x﹣2|的最小值为a.
(1)求a的值;
(2)解不等式f(x)>4.
(1)求a的值;
(2)解不等式f(x)>4.
您最近一年使用:0次