现有下列命题:
①命题“
”的否定是“
”;
②若
,
,则
=
;
③函数
是偶函数的充要条件是
;
④若非零向量
满足
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6e5afe8d3051d79a3b8a560c79393d.png)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(
),则
=1.
其中正确命题的序号有________ .(把所有真命题的序号都填上)
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7371cdee2dc27a787bf3edbc030ac98b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66d3d3cb916c57355924f0f00d0950b.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c731a7dbd387f81ae91a5a3fb46826dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8401ea399c28e292101208cb85b455a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75c6d0847cbfb5690d6671d0faa574d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/973bd09ae9775d390177e5bc07d091c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f2595c1b63398434d41069228e5f75.png)
④若非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6e5afe8d3051d79a3b8a560c79393d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd9736828195f010db4e1f0a9dea7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
其中正确命题的序号有
更新时间:2016-12-13 11:02:56
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【推荐1】在
中,内角
所对的边分别是
,有如下命题:①若
,则
;②若
,则
为等边三角形;③若
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使得
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![](https://img.xkw.com/dksih/QBM/2016/11/17/1573154205016064/1573154210668544/STEM/74e9f24de2e146afa5ed26b06a40349c.png?resizew=46)
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![](https://img.xkw.com/dksih/QBM/2016/11/17/1573154205016064/1573154210668544/STEM/5ace238789fb4e719108d1d78deb814f.png?resizew=148)
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![](https://img.xkw.com/dksih/QBM/2016/11/17/1573154205016064/1573154210668544/STEM/8315ccc1344b4bb7a946d7ed9ceecc28.png?resizew=253)
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【推荐2】已知曲线F(x,y)=0关于x轴、y轴和直线y=x均对称,设集合S={(x,y)|F(x,y)=0,x∈Z,y∈Z}.下列命题:
①若(1,2)∈S,则(-2,-1)∈S;
②若(0,2)∈S,则S中至少有4个元素;
③S中元素的个数一定为偶数;
④若{(x,y)|y2=4x,x∈Z,y∈Z}⊆S,则{(x,y)|x2=-4y,x∈Z,y∈Z}⊆S.
其中正确命题的序号为______ .(写出所有正确命题的序号)
①若(1,2)∈S,则(-2,-1)∈S;
②若(0,2)∈S,则S中至少有4个元素;
③S中元素的个数一定为偶数;
④若{(x,y)|y2=4x,x∈Z,y∈Z}⊆S,则{(x,y)|x2=-4y,x∈Z,y∈Z}⊆S.
其中正确命题的序号为
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