解题方法
1 . 已知三棱锥
如图所示,G为
重心,点M,F为
中点,点D,E分别在
上,
,
,以下说法正确的是( )
![](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/4464c4de8e55ae43a3ba752070826d07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd95eaf34ef0c66569901f57e54d099d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088a94009620f7efe7f5cd884f99867f.png)
A.若![]() ![]() ![]() |
B.![]() |
C.![]() |
D.若M,D,E,F四点共面,则![]() |
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2 . 在三棱锥
中,
,
,点
在
上,
,
为
中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb53a5e73f95e3f46a34965c5c0ac73.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ccad4025134a601044fbc58f1cf4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3744bb598bb9292a98812dddf9fdb3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c6aa2a7c840613899fac45f7dd04789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb53a5e73f95e3f46a34965c5c0ac73.png)
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3 . 如图,在三棱柱
中,M,N分别是线段
上的点,且
.设
,且均为单位向量,若
,则下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2743e10dd8bce468d1d397b3e9a550d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7858eaa13d53592a6fdc63d7de28057b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c01e7c22a736cba039fc4b2913e185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17df623122e2cfefe652b417cc436506.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/7c923bc0-1a2b-4e39-a06d-7231ce106b9a.png?resizew=160)
A.![]() ![]() ![]() | B.![]() |
C.![]() | D.![]() |
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4 . 如图,在四面体
中,点
是棱
上的点,且
,点
是棱
的中点.若
,其中
,
,
为实数,则
的值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/59f9115f-9062-480a-a43c-93d68b34eaa6.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/5aa9c3b0d19ae046b55ca748249969a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f92d8955af0ae0f395c0ff4be872b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1433c8103033c67232f2f9ae189608d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/59f9115f-9062-480a-a43c-93d68b34eaa6.png?resizew=150)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
5 . 在棱长为1的正四面体
中,
分别为
的中点,则下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/25a2638b-2c63-40a4-9b1c-d4e918b6c273.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46c696ff5f123a482bae81cf9a1b570.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/25a2638b-2c63-40a4-9b1c-d4e918b6c273.png?resizew=179)
A.![]() |
B.![]() |
C.![]() ![]() |
D.![]() ![]() ![]() |
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6 . 如图,在平行六面体
中,
,
,
,
,则
等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/25d9bca4-001c-4792-978a-66ade22a8463.png?resizew=138)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c6b0a6cb307c4c02f503831862f7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecbca919bff5a39a99dd7f867dd61f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f13a7e088e027e8e0120810deae72d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/25d9bca4-001c-4792-978a-66ade22a8463.png?resizew=138)
A.![]() | B.![]() | C.![]() | D.10 |
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2024-02-06更新
|
246次组卷
|
3卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷河南省信阳市2023-2024学年高二上学期期末教学质量检测数学试题(已下线)第七章 应用空间向量解立体几何问题拓展 专题一 空间向量基底法 微点5 空间向量基底法综合训练【基础版】
7 . 已知空间向量
的模长分别为1,2,3,且两两夹角均为
,点
为
的重心,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ad85b1b027a45ce5cbde9ed1fd9632.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12e912c56b58fc780489fab055aa94b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ad85b1b027a45ce5cbde9ed1fd9632.png)
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解题方法
8 . 如图,四面体
中,
,
,
,
,
,
分别是
,
的中点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116aa36f6a9332fa772a35c6028f5598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68963a152bb8afd1639340ef0b654a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9fa8832f98b5418a7d75892f7951b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd0c00f62c22e90e7d542a2f8dd83d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/623d18bc-3602-4449-aa84-9a8d5008eecb.png?resizew=165)
您最近一年使用:0次
9 . 如图,点
是四面体
的棱
的中点,点
是三角形
的重心,点
在线段
上,且
,设
,
,
,则下列等式成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/31fca225-6ba7-4e87-8a70-9c8e4f42dcba.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb802b0cd77d772dceff0d9ff6c879ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc16de84ba253ac1471602c3ed28b019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420ad6159fc091d6a5ffddf0676d2662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c2e7e9fd8519fd1c293cc577408263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40f8ef7e3af00c41f85a20578afdb57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/31fca225-6ba7-4e87-8a70-9c8e4f42dcba.png?resizew=162)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
10 . 如图,在三棱柱
中,
,若
,
则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/29d4e247-3a40-4edd-aa06-0e5271b8a0f8.png?resizew=130)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d2a8cd759ec5f444905e620957f8b6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6414b5c96d97272affd14102fb2eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee477d164d38ff067fc4ce342cf6d380.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/29d4e247-3a40-4edd-aa06-0e5271b8a0f8.png?resizew=130)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次