在四面体OABC中,
是棱OA上靠近
的三等分点,
分别是
的中点,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33a7fe8acce3fc214d44459e92ffa97.png)
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee477d164d38ff067fc4ce342cf6d380.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518407c06c4c966f670ea9d2414984a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fa87ac2b7d6a58f5aaee923d83f799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33a7fe8acce3fc214d44459e92ffa97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71af5e80069433636f4ef0227a508dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8d49bf33e578b25811e22e26dbf584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee477d164d38ff067fc4ce342cf6d380.png)
更新时间:2024-05-07 13:01:18
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名校
解题方法
【推荐1】如图,空间四边形
中,
,
,
,点
在
上,且
,
为
中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8926ddd0b69d714c7310cc5bf23d199d.png)
______ (用
,
,
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14390e9b6b44472bdc7a131133ab39b1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8926ddd0b69d714c7310cc5bf23d199d.png)
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填空题-单空题
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【推荐2】如图所示,已知空间四边形ABCD各边长为2,连接AC、BD,M、G分别是BC、CD的中点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0a69f4daa54d6ee6d72833231e7b78.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0a69f4daa54d6ee6d72833231e7b78.png)
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【推荐1】如图,在正方体OABC-O1A1B1C1中,点G为△ACO1的重心,若
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则x+y+z=____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47237e7fe2200764aa7e52aa6acc888d.png)
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您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐2】如图所示,在四面体
中,点
是
的中点,记
,
,
,令
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee477d164d38ff067fc4ce342cf6d380.png)
______ .
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您最近一年使用:0次