1 . 若
,则称
为
维空间向量集,
为零向量,对于
,任意
,定义:
①数乘运算:
;
②加法运算:
;
③数量积运算:
;
④向量的模:
,
对于
中一组向量
,若存在一组不同时为零的实数
使得
,则称这组向量线性相关,否则称为线性无关,
(1)对于
,判断下列各组向量是否线性相关:
①
;
②
;
(2)已知
线性无关,试判断
是否线性相关,并说明理由;
(3)证明:对于
中的任意两个元素
,均有
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d935457799f234e86a59e2f662d5ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00d8f90655e6341907aa9c7c62d4398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554f144d15fc567b25935b38917430c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aff8d9b6533ff319420cdc5e8740b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e1156e087d0c92bf15ea7a53d021fcc.png)
①数乘运算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee3d2d5f39d4050799537d5ad6bb375.png)
②加法运算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374036b2d97be3bb771c6d1bfd2ae6eb.png)
③数量积运算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3760d1b114cab294d2b8af405de49814.png)
④向量的模:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e7f7030526d65d5fff785d0d35a6ba.png)
对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00d8f90655e6341907aa9c7c62d4398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab882b48940b6e1a185a513a0d8e8d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3e3f607c7d170c8a9e614bfd2cb5f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946f81ae87f9c8cdc1017af6c1ec2fb2.png)
(1)对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56eb5f6747ea94d1075210265214211.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6432103414cd0efd40a0c0017eb11b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf1bee58a691b31e06e088afed4c25c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76eb5fb9c09b830eecb5ba7efea4e09.png)
(3)证明:对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00d8f90655e6341907aa9c7c62d4398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c21920a0a39b1604e130601f061b056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1120f6ff618146c9851df5dea05c1f55.png)
您最近一年使用:0次
名校
2 . 向量外积(又称叉积)广泛应用于物理与数学领域.定义两个向量
与
的叉积
,规定
的模长为
,
与
、
所在平面垂直,其方向满足如图1所示规则,且须满足如图所示的排列顺序.已知向量外积满足分配律,且
.
;②
;
(2)空间直角坐标系中有向量
,
①若
,用含
的坐标表示
;
②
证明:
;
(3)如图2所示,平面直角坐标系
中有三角形OAB,
,试探究
的表达式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4b78561c1b513a90122730a126d585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcf3f31d18fa318e4f947d331ddd229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a4813c1052e3e1a7f229c85156c61b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb30a9b89b6310c560c56a79a9bdb30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92fe31d138472bc7f4b99050b97007f.png)
(2)空间直角坐标系中有向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af4e5a239ec34b9dd46a8b9518f86658.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea61e69fd7a319942f48082c341ac2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb17664b1f6e969b1cf22e95cef9075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3680f37d3a0a5fb8038213ccf33f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d641794c36b9ab43f9dc5ba02a0f65ef.png)
(3)如图2所示,平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de77ee0b176035fd3a89edc2ad957a77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a711bf44ed64556c72fbb0e7f42c27f.png)
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名校
3 . 三阶行列式是解决复杂代数运算的算法,其运算法则如下:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c971b2ecdfce17d75d0290dd194baa3b.png)
.若
,则称
为空间向量
与
的叉乘,其中
,
,
为单位正交基底.以
为坐标原点,分别以
的方向为
轴、
轴、
轴的正方向建立空间直角坐标系,已知
是空间直角坐标系中异于
的不同两点.
(1)①若
,求
;
②证明:
.
(2)记
的面积为
,证明:
;
(3)问:
的几何意义表示以
为底面、
为高的三棱锥体积的多少倍?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c971b2ecdfce17d75d0290dd194baa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b759f4d0af0d28b35bdd5648db70968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b44b6a86302386ebf96b784d02b039c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4e6bae1b67a0a1eeafdd1114a792df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f4837cd4b882c0380201dd437e7ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2772831f709c3c7c9a334b9444e0504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808173f5aafa97a38056d68247d68314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4664eed9e1abab0ed6397c58d70e731.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faea453a5148e6b281c75a0caa793452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00db2bada2cfc90c5213aca8af17df4c.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f36900d061dee46d3f76344ac576ba1.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29aa828f2bd9a5e63ee58dcaa9d0d336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd55f2f03192e5f0d76bf1cdb51872f2.png)
(3)问:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0cfd110195cf5e453947d1648ef605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4124e7ab7a93ee45858b3a4d4ab3508b.png)
您最近一年使用:0次
2024-03-26更新
|
638次组卷
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3卷引用:重庆市荣昌中学校2023-2024学年高一下学期4月期中考试数学试题
名校
4 . 如图,已知正方形
和矩形
所在的平面互相垂直,
,
,M是线段
的中点.
平面
;
(2)若
,求二面角
的大小;
(3)若线段
上总存在一点P,使得
,求t的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef45f443346d6214dd03e0aea2e190cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4019805fed3b6cca619f4035e7618cd0.png)
(3)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1e3f76c717167bf2b5b1e0d291b39f.png)
您最近一年使用:0次
2023-10-27更新
|
986次组卷
|
16卷引用:江西省丰城中学2022-2023学年高一下学期期末考试数学试题
江西省丰城中学2022-2023学年高一下学期期末考试数学试题江苏省苏州市2019-2020学年高二上学期期末数学试题(已下线)专题07 空间向量与立体几何-【备战高考】2021年高三数学高考复习刷题宝典(压轴题专练)(已下线)第24节 直线、平面平行的判定与性质-备战2023年高考数学一轮复习考点帮(全国通用)广东省汕头市潮阳区棉城中学2021-2022学年高二上学期期中数学试题第一章 空间向量与立体几何单元测试(巅峰版)辽宁省大连部分重点高中2022-2023学年高二上学期10月月考数学试卷河南省濮阳市南乐县第一高级中学2022-2023学年高二上学期第一次月考数学试题福建省漳州立人高级中学2022-2023学年高二下学期期中数学试题江西省龙南中学2022-2023学年高二下学期期中数学试题广东省梅州市大埔县虎山中学2023-2024学年高二上学期期中数学试题广东省揭阳市普宁市兴文中学2023-2024学年高二上学期期中数学试题广东省汕头市潮阳一中明光学校2023-2024学年高二上学期期中测试数学试卷西藏林芝市2023-2024学年高二上学期期末学业水平监测数学试题(已下线)专题01 空间向量与立体几何(3)(已下线)模块三 专题2 解答题分类练 专题3 空间向量线性运算(苏教版)
名校
解题方法
5 . 如图,在四棱锥
中,底面ABCD是直角梯形,
,
,平面
平面PBC,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/30/1fe6a199-6b0d-494f-84fb-860b05aa8b26.png?resizew=212)
(1)求证:
;
(2)若PD与平面PBC所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b418c949737345add0656cae0c41ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b231f50f6c14414a40a03b3a0c962e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/30/1fe6a199-6b0d-494f-84fb-860b05aa8b26.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)若PD与平面PBC所成的角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa431d661bf9f419e8ab713dd4a3c80.png)
您最近一年使用:0次
2022-06-28更新
|
1536次组卷
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3卷引用:浙江省嘉兴市2021-2022学年高一下学期期末数学试题