1.4.2 运用立体几何中的向量方法解决垂直问题
重点练
一、单选题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96cdad9b7b5c1a2d14f84b82db6775a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/ff26c4e1-8054-4779-8eba-8cddbd12fa8d.png?resizew=143)
A.![]() | B.![]() |
C.![]() | D.E与B重合 |
【知识点】 空间位置关系的向量证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9cd8c509f4980a3d3130bb282ca6964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51fbb2b430afef6f0ed8c16b27bc069.png)
A.相交 | B.垂直 |
C.不垂直 | D.成60°角 |
【知识点】 空间位置关系的向量证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8034e5be66ab92add1cd525c48abc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/0da7ba11-434f-4542-bf9c-6584112bf46e.png?resizew=170)
A.位置保持不变 | B.在一条直线上 |
C.在一个圆上 | D.在一个椭圆上 |
【知识点】 空间位置关系的向量证明
二、填空题
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd76d3113d736079c0a6b18ed6a2cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aff1c9f2d6e5ce88ac813c16c874b3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd76d3113d736079c0a6b18ed6a2cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aff1c9f2d6e5ce88ac813c16c874b3a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd76d3113d736079c0a6b18ed6a2cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aff1c9f2d6e5ce88ac813c16c874b3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd76d3113d736079c0a6b18ed6a2cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aff1c9f2d6e5ce88ac813c16c874b3a.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50e897700e0b9e8e31e677b4d241dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2859333183a1d5749eac25f8b4e3b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50e897700e0b9e8e31e677b4d241dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2859333183a1d5749eac25f8b4e3b45.png)
④若两个平面的法向量不垂直,则这两个平面一定不垂直.
【知识点】 平面法向量的概念及辨析
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051f092cbf89536d7e8b9fbf9d49355d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/908e7bb3df0414f7f7ff59d97e393dfe.png)
三、解答题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f07107087ce4abdfa5fc68fe6fb62f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749e49ec2d4dc0fc04764620fbfac4e4.png)
![](https://img.xkw.com/dksih/QBM/2019/12/21/2363526584410112/2421389400858624/STEM/7a5a4e6950224069a4aec8510e83f0a2.png?resizew=426)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4525c00ed908bed8ba8d353e747a858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19388f2279d9e2f727ae9d9b3a5e80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747978ec67fee6ee9eb07d02b80987d7.png)
【知识点】 证明线面垂直 补全面面垂直的条件 空间位置关系的向量证明