已知
是边长为1的等边三角形,向量
,
满足
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705714b83ed76bd124b5bef62d9f2c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72ba10871ce0aafdf734751ddacd657.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2022-05-21 22:17:31
|
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解题方法
【推荐1】如图,
中,
,
,点E是
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,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐1】在△ABC中,
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|=|
|,则向量
在向量
上的投影为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba370a3912d1a983146af9c7f9c950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d956b09c004ddf8bdf6669a8182e80ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
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A.![]() | B.-![]() | C.﹣![]() | D.![]() |
您最近一年使用:0次
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【推荐2】已知单位向量
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0db098f06d3263041b039ce2bc35ade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767f60190a98f0d7e49bac1cf988dbc0.png)
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您最近一年使用:0次
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【推荐1】已知向量
,
满足
,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】在
中,
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的重心,若
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外接圆的半径为( )
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A.![]() | B.2 | C.![]() | D.![]() |
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