已知
,若
,则![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/3d9151f340ec4b8cad3d09c853288b9b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/4350ecd4206c496e8dd03d945cb836df.png)
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/d08a7af411ed4de4aced01efa1f6aa7a.png)
![](https://img.xkw.com/dksih/QBM/2016/9/20/1573031639203840/1573031645224960/STEM/3d9151f340ec4b8cad3d09c853288b9b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2016-12-04 20:43:59
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【知识点】 向量在几何中的应用
相似题推荐
单选题
|
较易
(0.85)
【推荐1】设向量
=(m,1),
=(1,2),且|
+
|2=|
|2+|
|2,则m=
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999335944192/1572999341318144/STEM/be9850e4aae64778af3fe832051ae886.png)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999335944192/1572999341318144/STEM/cbebe626ef504224bc9996684655a80e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999335944192/1572999341318144/STEM/be9850e4aae64778af3fe832051ae886.png)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999335944192/1572999341318144/STEM/cbebe626ef504224bc9996684655a80e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999335944192/1572999341318144/STEM/be9850e4aae64778af3fe832051ae886.png)
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999335944192/1572999341318144/STEM/cbebe626ef504224bc9996684655a80e.png)
A.![]() | B.1 | C.![]() | D.![]() |
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