如图,已知四面体
的所有棱长都等于2,点
,
分别为
,
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ffbc369e2b6d091ec6aeca032ecf5c.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ffbc369e2b6d091ec6aeca032ecf5c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/7e1bb291-6ecc-4b86-9409-abf8fc1bd041.png?resizew=174)
21-22高二上·北京丰台·期中 查看更多[2]
北京市丰台区2021-2022学年高二上学期数学期中练习试题(B卷)(已下线)1.1.1 空间向量及其运算(分层练习)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第一册)
更新时间:2021-11-11 13:39:21
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【知识点】 求空间向量的数量积
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填空题-单空题
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较易
(0.85)
【推荐1】已知直线
的一个方向向量为
,平面
的一个法向量为
,当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134cc3babc8ca284fae69d59b77d26f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e6409601355d5ba4369420e1e409c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87446a7f3d8663e3fa62157adcbe2835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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