名校
1 . 如图,在四棱锥
中,底面
是平行四边形,E,F分别为
,
中点.求证:向量
、
、
共面.
![](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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae54940f33b8714da5fe3b7546f8b3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89265cbe3abc6b966ce8967fead448b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/471ac0f42d01c6d6e094b63628586e4d.png)
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解题方法
2 . 已知三棱锥
底面
为边长为2的等边三角形,
是底面
上一点,三棱锥体积
.则对
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca8e418169236c1bf5c90a2c75c8683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddfb6a557e977b80a7e079413eab6c83.png)
A.1 | B.3 | C.![]() | D.![]() |
您最近一年使用:0次
名校
3 . 在三棱柱
中,若
,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/3eab8c53-e5b2-43bb-ac48-ac72f0dba9c3.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e55362a3a1f592e6551851c42d3078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9206f052cc7298fdf9049f9386f53928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8780f5b68f8907a57c1c2f96233a78c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a5b3db010507ba0985f57168d9150c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/3eab8c53-e5b2-43bb-ac48-ac72f0dba9c3.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-29更新
|
255次组卷
|
2卷引用:山东省济南市2023-2024学年高二上学期1月期末质量检测数学试题
4 . 已知
分别是空间四边形
的对角线
的中点,点
是线段
的中点,
为空间中任意一点,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/df20aa34-29ec-4e31-a8e4-b79952ebeda2.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f7baef11cff42908b554e884bb97eb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/df20aa34-29ec-4e31-a8e4-b79952ebeda2.png?resizew=168)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 如图,在平行六面体
中,
,
,
,点
在
上,且
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/83ba5e17-8279-4c25-9c44-289dc0a47b9b.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b536ac375a0b74e9c7efbc585f987f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4abd10ab43ce90743bd0f79b1f5bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc6f461f4715a6c25e8df41ab35a565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7fc803bd415ce6c8b7f9dd300e806b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e9c6b249810d08cb9531e701f058b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/83ba5e17-8279-4c25-9c44-289dc0a47b9b.png?resizew=150)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
6 . 在三棱锥
中,
为
的中点,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/1e99e52d-3af5-4dcd-a98d-0481254bc045.png?resizew=155)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d859221abb763742e332779e9eab59.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/1e99e52d-3af5-4dcd-a98d-0481254bc045.png?resizew=155)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-02-12更新
|
234次组卷
|
5卷引用:河北省保定市定州市2023-2024学年高二上学期1月期末考试数学试题
7 . 如图所示,空间四边形
中,
,点
分别为
上的点,且
为
中点,则
等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/16637f6c-a65c-4485-b1e8-5ce8b817380c.png?resizew=147)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4cf572c0cb3e8b3978b5f834bd9b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc3ee16ccc10bb5a1ddd181a3f9989b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6623a893148b78d2898baff3a279858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a014dff8997c661055229de29c61cfc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/16637f6c-a65c-4485-b1e8-5ce8b817380c.png?resizew=147)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
8 . 如图,在平行六面体中,记
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/b3dab8d3-dd56-4544-a0dc-3c188ab0caa7.png?resizew=172)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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2024-01-30更新
|
119次组卷
|
2卷引用:浙江省台州市2023-2024学年高二上学期1月期末质量评估数学试题
9 . 已知四面体
中,
是
的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/188bab5731f087bf6fbafbb9bac6324d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
10 . 在空间四边形ABCD中,点M,G分别是BC和CD的中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4db30baed99bca1214342feb22e4f5a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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|
251次组卷
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8卷引用:3.2空间向量与向量运算 测试卷——2022-2023学年高二上学期数学北师大版(2019)选择性必修第一册
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