解题方法
1 . 设函数f(x)对x≠0的一切实数都有f(x)+2f(
)=3x,则f(x)=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5a02f375bd3b6bc4e07273beb3559a.png)
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2 . 设定义域为
上的单调函数
,对于任意的
,都有
,则![](https://img.xkw.com/dksih/QBM/2016/5/25/1572646533177344/1572646538526720/STEM/04897bc4f5dd4770ba494204c62d7cfc.png?resizew=48)
________ .
![](https://img.xkw.com/dksih/QBM/2016/5/25/1572646533177344/1572646538526720/STEM/8a173daff6c14fffae0cdb7f65f56790.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2016/5/25/1572646533177344/1572646538526720/STEM/37fc1216c8cc4500ad722f70cf2976db.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/5/25/1572646533177344/1572646538526720/STEM/df338aecfea84f80bd0c488dab071675.png?resizew=72)
![](https://img.xkw.com/dksih/QBM/2016/5/25/1572646533177344/1572646538526720/STEM/a9e6e80f28694456aee1b03cd7e29301.png?resizew=111)
![](https://img.xkw.com/dksih/QBM/2016/5/25/1572646533177344/1572646538526720/STEM/04897bc4f5dd4770ba494204c62d7cfc.png?resizew=48)
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