如图,在直四棱柱
中,底面是边长为1的菱形,侧棱长为2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/a5d57976-efe3-4f7d-bcf0-b8154590fd3b.png?resizew=158)
与
能否垂直?说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/23/a5d57976-efe3-4f7d-bcf0-b8154590fd3b.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
2023高三·全国·专题练习 查看更多[2]
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-问答题
|
容易
(0.94)
【推荐1】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)
您最近一年使用:0次
解答题-证明题
|
容易
(0.94)
解题方法
【推荐2】证明“平面与平面平行的判定定理”:同一个平面内有两条相交直线与另一个平面平行,则这两个平面平行.
已知:
,
,
,
,
.
求证:
.
已知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e5acb08c1dd5f53d8ad43d53acb199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5475e10ea3f37788e680395999037a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60750b5eab6344496e925eb603cab46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d6a7aec04e1d5768ef830b534460a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b330d69a949d9b55f4b6f18f47e0a37.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
您最近一年使用:0次