2011·贵州·模拟预测
1 . 给出下列四个命题:
①在空间,若四点不共面,则每三个点一定不共线;
②已知命题
,“非
为假命题”是“
或
是真命题”的必要不充分条件;
③若
,那么
;
④若奇函数
对于定义域内任意
都有
,则
为周期函数.
其中错误命题的序号为____________ .
①在空间,若四点不共面,则每三个点一定不共线;
②已知命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a550c916c64f621010e604a30ef67566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d63b747a76213afe863d7f05431da48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13a828975535efba2e25cdcf71988be.png)
④若奇函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7559fb6b4b5a4e8fc721675ab1775a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
其中错误命题的序号为
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