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1 . 如图,在所有棱长均为
的平行六面体
中,
为
与
交点,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29325f51647dde45ffa565600d353d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bf77c7d1d6c962297fe7d7622ac2f8.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb885a5b92767aa3dd7b3ca28c3488ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bf77c7d1d6c962297fe7d7622ac2f8.png)
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3 . 如图,在三棱柱
中,底面
为等边三角形,
为
的重心,
,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c0001a835d8130df391a285e17bbbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3622e4c3d5a0c6b9b5db067a6a5563.png)
A.![]() | B.![]() |
C.![]() ![]() ![]() | D.![]() |
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4 . 已知
为单位向量.
,若
,则
在
上的投影向量为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06324471807b8928d45a68c6b971e30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3fcfd4bcad59c32d22624e5eea264bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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解题方法
5 . 已知向量
则向量
在向量
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9c0bd28ec7a3c7b44a37501fc8e87a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-03-07更新
|
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7卷引用:安徽省黄山市2023-2024学年高二上学期期末质量检测数学试题
安徽省黄山市2023-2024学年高二上学期期末质量检测数学试题江苏省连云港市东海高级中学2023-2024学年高二下学期第一次月考数学试卷福建省莆田市锦江中学2023-2024学年高二下学期3月月考数学试题(已下线)高二 模块3 专题1 第2套 小题进阶提升练(苏教版)江苏省宿迁地区2023-2024学年高二下学期期中调研测试数学试题(已下线)专题01 空间向量表示及运算--高二期末考点大串讲(苏教版2019选择性必修第二册)重庆市杨家坪中学2023-2024学年高三下学期第二次月考数学试题
解题方法
6 . 如图,在平行六面体
中,
,
.设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/58b29fe2-0ba5-4e11-afb4-f5e5b6e62003.png?resizew=158)
(1)用基底
表示向量
,
,
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7046ea5ec8bb0f777482b086d181e2e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ecd2fb9d59e0d9a46ea3062f566ff40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e984585ddf28c039219afcebf229de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5ad65006ab94c402084227f4675b57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/58b29fe2-0ba5-4e11-afb4-f5e5b6e62003.png?resizew=158)
(1)用基底
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21775d2a1d85b5be06c17f6eeddfd9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4781e3daa2c4e018ca0ae09bb56abc0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bdd77c24f415d52848ff40bc8574b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333a232d5882b2f03f9e02846c442a95.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d1f6daed7a89d2c7aee5dd8f2d1ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd148d264bc9043396f777523e907aa.png)
您最近一年使用:0次
7 . 已知
是空间的一个单位正交基底,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5401d7f4a297c8b097e74bdebaaa8570.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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8 . 如图所示,平行六面体
中,
,
.
(1)用向量
表示向量
,并求
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d20d9a8058985d9847ddd99046fdb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22a27ea00fee0b2571c6f1e8cc943a1d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/ed55734c-a610-409b-8b20-2f769dfb319c.png?resizew=113)
(1)用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68873c59a21b0cd408cdf2b47d51096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccec46f7c4da972fef6e940158628242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33e3af60b6aa94f39bbd04470d2e404.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388e976ab53ad76d39c74b59a09b1663.png)
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9 . 已知空间向量
,
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf20929e6e0a15963131ebe72cb0eb3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56841b5b4f90b829685e11165298e372.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() ![]() |
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10 . 向量
在向量
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bc44c2c100d504f3bd2b71db08dc412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87bf2020d0ef698c58a5ad3c700cf53.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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