名校
解题方法
1 . 下列命题中,正确的有( )
A.![]() |
B.若平面向量![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.若平面向量![]() ![]() ![]() ![]() ![]() ![]() |
D.若平面向量![]() ![]() ![]() ![]() |
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2023-09-20更新
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260次组卷
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2卷引用:河北省邢台市第二中学2022-2023学年高一下学期3月月考数学试题
2 . 对于平面内
个起点相同的单位向量
,若每个向量与其相邻向量的夹角均为
,则
与
的位置关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf722077fcd08540550e13cbf57ed20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821786fe974c795b7869a895adfafed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be15993393fad482100b20ce63b3f32.png)
A.垂直 | B.反向平行 | C.同向平行 | D.无法确定 |
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解题方法
3 . 已知点
是
所在平面内任一点,
为
的中点,
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472f6935643110156e882dd3984df3bb.png)
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d303c32af8831735d4e0f86fa45874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd238b0b84cd8b316916ec9e7cb8316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d4eb6765c6119663e09ce4b4899f4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472f6935643110156e882dd3984df3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7a520ea22de738daa04232a102dff9.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
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