已知
为BC的中点,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e7e6ba35e6fb0b04f2c08853ff12dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7385a7caee96f0030f1760f70e1150e4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-25 10:01:29
|
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单选题
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适中
(0.65)
名校
解题方法
【推荐1】如图,已知
,
,
,
,
,则
等于
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/bc0a65f1-43ad-4b6c-9c9e-b4f67c00c5b9.png?resizew=120)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43c643f0c75a965e776df7a531b16f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfb836792b1eebfbd08a6f46fae580e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edeb12d08bc43eaa3dfc9b17068902f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0be44077d42cfffece905b1af13e000.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/bc0a65f1-43ad-4b6c-9c9e-b4f67c00c5b9.png?resizew=120)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
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解题方法
【推荐2】已知
是边长为4的等边三角形,
为平面
内一点,则
的最小值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
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【推荐1】已知向量
,
,若
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与
的夹角
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/016e4d15ab8f5359f6aa3b42674b0c13.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d108e523626be0b40be9b3543ce12524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
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您最近一年使用:0次
单选题
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【推荐2】已知向量
,
,且
与
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A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次