已知函数
,不等式
的解集为
.
(1)求
的值;
(2)若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2caaa9f5fda86a33f067300545196d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aac626c05da00b3d40cf260cb95f4a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad4099ebc64187f7de0c49e84d6185b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7daa23c80e645fa52021bf6b2c6bf642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2018-05-08 23:28:56
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适中
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【推荐1】已知函数
,若不等式
的解集为
.
(1)求
的值;
(2)若存在
,使得不等式
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398cd042bec35d34a2baab186461d095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4aa539556add14df9b3fc68b9827464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe856bb0d4969bfeaf2db60ed6b41f8e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc89845d1f668d57780b56e154baed9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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适中
(0.65)
解题方法
【推荐2】选修4-5:不等式选讲
已知函数
.
(1)解不等式
;
(2)设
,若关于
的不等式
解集非空,求实数
的取值范围.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70295905e8ef258e2278c219382f872.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491a83ad4f6395e0bbaa4941d3cec742.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c8714b8744f6aa2c2c6a8e4c9376c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐1】选修4-5:不等式选讲
已知函数
,若
的最小值为2.
(1)求实数
的值;
(2)若
,且
均为正实数,且满足
,求
的最小值.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6371a6e919c30baf3ace84ab06e3d94c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18bf676b743728833d21db05f7d55a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c918ca5d4e6d46ed130f85e5fa608d.png)
您最近一年使用:0次
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【推荐2】已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca2a7fad1c23e1bc2fd8d85b8971c5d.png)
(1)当
时,解关于
的不等式
;
(2)若对
,都有
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290db1b70bd70d32888a5b677c125879.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca2a7fad1c23e1bc2fd8d85b8971c5d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5c1a7acdad9794447abfe58bd9f806.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5d9a0f5e3cbc65ea723d7d95a64265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4624a648f30189a10c8b6683b190ce5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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