12-13高二下·江苏宿迁·期中
解题方法
1 . 给出下列命题:①在区间
上,函数
,
,
,
中有三个是增函数;②若
,则;③若函数
是奇函数,则
的图象关于点
对称;④函数
有2个零点.其中正确命题的序号为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e95e9ced21d462feb723ad74690d8a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6534777c164d9da542e2c505bdba8e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72c36149bd2a42b7e05714cb3803e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904567c3b3734e1eca8d042ef7a7b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b137ee78471a99f06de91602d5dcf82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed2dd8a797d6da9c89e858aed9a7da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d497d087eb4ccd8311fd7c8a1f014d5.png)
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