设
是四面体,
是
的重心,
是
上一点,且
,若
,则
为__________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b3fb2da3909e643ef238b8d0ac559e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f9049f32b8b36ebcd94ef69b48d908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee4592a7e5f85100f6cd8de62f2ba53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d29a8529749eeebfc191a77d6412558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d685c54089867c395a4c49ba01b1237.png)
14-15高二上·广东汕头·期末 查看更多[4]
(已下线)2013-2014学年广东汕头金山中学高二上学期期末理科数学试卷(已下线)2013-2014学年广东汕头金山中学高二上学期期末理数学卷(已下线)专题36空间向量的概念与运算-2022年(新高考)数学高频考点+重点题型(已下线)考点51 空间向量的概念-备战2022年高考数学一轮复习考点帮(新高考地区专用)【学科网名师堂】
更新时间:2016-12-02 19:42:41
|
【知识点】 空间向量加减运算的几何表示
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适中
(0.65)
名校
【推荐1】在正方体
中,已知
,
,
,
为底面的
的中心,
为
的重心,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611dcc1cd0d3c474f5ed63e42954cc74.png)
______ .(用
,
,
表示
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d45a8343de10979a1d2ec9f891788c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac978bcd25b759e7bb0e6d915cd6de0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fc4d8f24b7abfc68bbaf2f1cdf6228.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5da87fc05f67844901714a51cbc0112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611dcc1cd0d3c474f5ed63e42954cc74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670f6533aaf27dd575f4f26e0c5928d9.png)
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【推荐2】如图,在四面体OABC中,M是棱OA上靠近点A的三等分点,N,P分别是BC,MN的中点.设
,
,
,用
,
,
表示![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe0e90a236b0633452290473979ebc.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420ad6159fc091d6a5ffddf0676d2662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c2e7e9fd8519fd1c293cc577408263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40f8ef7e3af00c41f85a20578afdb57.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/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe0e90a236b0633452290473979ebc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/4/bde83123-41ec-42fe-bb5e-708c025f0f79.jpg?resizew=125)
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