2014·山西忻州·一模
1 . 已知函数
是定义在R上的偶函数,对于任意
都
成立;当
,且
时,都有
.给出下列四个命题:①
;②直线
是函数
图象的一条对称轴;③函数
在
上为增函数;④函数
在
上有335个零点.
其中正确命题的个数为
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/7eb39169b39d4c71bf856a573caa176d.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/d93453f1569b416e94b3b28340770bc1.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/3b23b7b94b7249e1b1c788d32eb0d62c.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/09eba4ad7f644562909c2fe2e76b97fc.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/18ae306370834837b2d61fd260f12381.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/c867e9ae53fd4dc2a6d033c08e8eb896.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/72d47e06fa4143ba96d296cfe046b9fc.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/f1c6af5d3f784999b81ba695512d2209.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/7eb39169b39d4c71bf856a573caa176d.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/7eb39169b39d4c71bf856a573caa176d.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/e2eb1d7c509f42fe8368e89f26c4893a.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/7eb39169b39d4c71bf856a573caa176d.png)
![](https://img.xkw.com/dksih/QBM/2014/12/8/1571919225880576/1571919231057920/STEM/05f496ec61a049728a4efae7a538ca62.png)
其中正确命题的个数为
A.1 | B.2 | C.3 | D.4 |
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A.1 | B.2 | C.3 | D.4 |