如图,在正方体
中,
为
的中点,点
在棱
上.若
,证明:
与平面
不垂直
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370cfaff07758cdfb11aa0dfbacdc041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6e90b3c6db0b9696640fb1940c4a8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/cca03186-6d46-4af8-a1d7-a4d4ee5376a4.png?resizew=164)
2023高三·全国·专题练习 查看更多[3]
(已下线)第05讲 空间向量及其应用(练)(已下线)专题02 空间向量与立体几何大题专项练习(已下线)1.2.2 空间中的平面与空间向量(分层训练)-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:2022-08-23 14:28:45
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【知识点】 空间位置关系的向量证明
相似题推荐
解答题-证明题
|
容易
(0.94)
名校
【推荐1】如图,在直三棱柱中,
,
,
,
,
分别是
,
的中点.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b201f1e798eb74963b98f2b0da4132.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
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解答题-问答题
|
容易
(0.94)
【推荐2】已知
为直线l的方向向量,
为平面
的法向量,且
,判断直线l与平面
的位置关系是平行还是垂直.
(1)
,
;
(2)
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6216d6de28ceeca34f8ae12264e8af21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9b2c3117321788078867bd0701743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223cf56cd0be4187bfce5b3a7ce82d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358fea22e6f3c79a2b35829581e2797e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a50cc0383b1d5602a5aef32b0fba50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dcc2cdbfa2042c9f09461148a8aaaec.png)
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解答题-证明题
|
容易
(0.94)
名校
【推荐3】如图,在四棱锥
中,底面
是矩形,
平面
,
,
,
是
的中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/a4d789d9-7164-428a-8932-b1b2a27146a5.png?resizew=141)
(1)证明:
平面
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a148e1cc59be85f85f41cafabeae11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/875cd2860fb57cedf932aa0535d2e1da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/a4d789d9-7164-428a-8932-b1b2a27146a5.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c982eb645d77aa24c642fca6d72e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
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