设函数
.
(1)若关于
的不等式
在
为自然对数的底数)上有实数解,求实数
的取值范围;
(2)设
,若关于
的方程
至少有一个解,求
的最小值;
(3)证明不等式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b407e8ad76ad0e64896bfb51ef054d.png)
(1)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6cf5ba23618b68a2fe6fe0fc45520d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42016a34f6f615c939e95e4ec8de1b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb61c150a07b4058b8417cf7bb6027a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b43db2ccdd3c135d96886302b0765d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(3)证明不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4cd85fe5cb85a16a6b6293b40ac9fa2.png)
2016·湖南·一模 查看更多[1]
更新时间:2016-12-04 19:20:10
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