如图,已知平行六面体
,设
是底面
的中心,N是侧面
的对角线
上的点,且
.若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5c4a59525f8376f187b81246ddf70f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae60fa1ecc283c9c460b5ab779e4a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/28/09edee3d-752d-4b5b-8312-de161ebccede.png?resizew=163)
21-22高二上·山西临汾·期中 查看更多[4]
更新时间:2023-10-10 23:26:49
|
【知识点】 用空间基底表示向量
相似题推荐
解答题-问答题
|
容易
(0.94)
【推荐1】在正四面体
中,点
为
的中点,点
为
的中点,试用向量
、
、
来表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304a7f07db2ec637baadf8f0ab91c85c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc78f89939084f4979069d2d5b45833.png)
您最近一年使用:0次
解答题-问答题
|
容易
(0.94)
名校
【推荐2】如图,在平行六面体
中,E,F分别为棱
,CD的中点,记
,
,
,满足
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/3154ab91-a1a3-41e0-9e1f-ef780d0979ab.png?resizew=213)
(1)用
,
,
表示
;
(2)计算
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c20cbdfe479954ba2bc33142bc931c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066bca5c293e81c8579c85cb365c4a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4654966ec154b40a92fab6fa5390542a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5e5c0d0bcecfefc6ce763098a3ddc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6627c2c12eb6deddcd3585bf6cd7337c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93b4787448ee5858e81109cc208b7b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc32568a310f81981445ca7385b03ee4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/3154ab91-a1a3-41e0-9e1f-ef780d0979ab.png?resizew=213)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc78f89939084f4979069d2d5b45833.png)
(2)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff4faea020790092dc1629e62bf006c.png)
您最近一年使用:0次