在研究函数
的性质时,某同学受两点间距离公式启发将
变形为,
,并给出关于函数
以下五个描述:
①函数
的图像是中心对称图形;②函数
的图像是轴对称图形;
③函数
在[0,6]上是增函数;④函数
没有最大值也没有最小值;
⑤无论m为何实数,关于x的方程
都有实数根.
其中描述正确的是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57a5822497ef7a4a903e24ffc26cb8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee507d719bade0636d5bdedf9f79382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
⑤无论m为何实数,关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a761229dccdb88af4669a18bf6233abc.png)
其中描述正确的是
更新时间:2017-03-10 23:34:12
|
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