1 . 已知函数
的定义域是R,对任意实数x,y,均有
,且当
时,
.
(Ⅰ)证明:
在R上是增函数;
(Ⅱ)判断
的奇偶性,并证明;
(Ⅲ)若
,求不等式
的解集.
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/76f75ff6fc7d452494cb31aeaf7ae65d.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/842d6dc2eb154e099f7988b9add9a984.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/8330ced873c341a38bc764179ab824e7.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/63b00e67ef09464895345b18805960ab.png)
(Ⅰ)证明:
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/76f75ff6fc7d452494cb31aeaf7ae65d.png)
(Ⅱ)判断
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/76f75ff6fc7d452494cb31aeaf7ae65d.png)
(Ⅲ)若
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/26469a57367e474393c48a3cc705dc76.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108673024/STEM/d5a372f58287465b97ce5528eacb10e6.png)
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2 . 已知函数
.
(Ⅰ)判断
的奇偶性,并证明;
(Ⅱ)求使
的
的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108632064/STEM/0ba52c03cfce46279c237816d0da0e80.png)
(Ⅰ)判断
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108632064/STEM/2446a3430be5449cb71a889eec586b9f.png)
(Ⅱ)求使
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108632064/STEM/5250a9643b874238ad296351b389ebcb.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356103176192/1572356108632064/STEM/af3a8f4151fd4d05a72a55dd9f2a84b9.png)
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