给出定义:若
(其中m为整数,则m叫做离实数x最近的整数,记作
,即
,在此基础上给出下列关于函数
的四个命题:
①
;
②点
是
的图像的对称中心,其中
;
③
的定义域是R,值域是
;
④函数
在
上是增函数.
则上述命题中真命题的序号是_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b82ec65b678aef2b8ae9f2b143d0c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda2bc2e6a5eaf4fa5ff901985dd0e53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf97282ec523daf6777acb34457a5a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537297b5e4c881dabdbac8a1db36ce45.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2d0c9d13770863f59ea9fa45488de63.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cdd7f28a76a121c00194d3126146bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a173784888adf2946382fa093ba53a.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8409821dd89cb2dd8c4a60779bfbb54.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a9e9891c8b667879fe0a001335aa94.png)
则上述命题中真命题的序号是
更新时间:2021-11-19 08:10:14
|
【知识点】 函数新定义
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