1 . 选修4—5:不等式选讲
已知函数
,
,且
的解集为
.
(1)求
的值;
(2)若
是正实数,且
,求证:
.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b598d84cc61dde187272a580089d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f51582ae5571f0ab228a39d07ba43d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afcb5ffc564b8272daeb6567e172d84.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d32e360693a7693390d47804e3d8858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940b4742c2fab4ebe5354f47c87d8886.png)
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2018-02-01更新
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2卷引用:江西省临川第一中学暨临川一中实验学校2021届高三三模数学(理)试题