如图所示,E,F分别是四面体OABC的棱OA、BC的中点,D是线段EF的一个四等分点(靠近E点),设
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/879b6960-35ba-46df-b112-d21def6e86dc.png?resizew=180)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f570823f32dce24caed626e00a0857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6513af393f60a995c7ab7435010981a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/879b6960-35ba-46df-b112-d21def6e86dc.png?resizew=180)
A.![]() | B.![]() |
C.![]() | D.![]() |
更新时间:2022-10-20 11:37:07
|
【知识点】 用空间基底表示向量
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【推荐1】如图,M,N分别是四面体OABC的边OA,BC的中点,E是MN的三等分点,且
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【推荐2】如图,在四面体
中,
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