解题方法
1 . 已知函数
,给出下列四个结论:
①函数
是奇函数;
②
,且
,关于x的方程
恰有两个不相等的实数根;
③已知
是曲线
上任意一点,
,则
;
④设
为曲线
上一点,
为曲线
上一点.若
,则
.
其中所有正确结论的序号是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d08e4a96cfcea8a303b56b35cafb47fb.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b10c7c83af99e5686133623e29c455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23899cffeb0d20e29e7212a7327c604a.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482ad28bbcbe8b8d384d84851a54386b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f614a56621170153a1a1c582a145ba.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793894c733026e3f5900b31538fcb731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2dff006a89ed43e44492206e8516e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3d36c7faa45fe5dae65a800cb59c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778083c63e464acd369abc5e667c8d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f850a3ec66b1438ca4da2c30b6939ea9.png)
其中所有正确结论的序号是
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