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)
您最近一年使用:0次
名校
解题方法
3 . 正方形ABCD中,
,点O为正方形内一个动点,且
,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96643cc016e7e68f30c445bf47936a3.png)
(1)当
时,求
的值;
(2)若P为平面ABCD外一点,满足
,记
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91934cac6477909cf68ec266f562a397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96643cc016e7e68f30c445bf47936a3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1f08c7640e62e8717abf4d44a6c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7444214a631d3904f722bc05f07d0f0.png)
(2)若P为平面ABCD外一点,满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1909a3a6c9c51b7232cbf5acdfdc734.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c5b8a21ed3092f78d0c6c05267b635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd288d4152caf5fc8187a1a901c8949f.png)
您最近一年使用:0次
2022-05-17更新
|
3111次组卷
|
5卷引用:重庆市巴蜀中学校2021-2022学年高一下学期期中数学试题
21-22高二·湖南·课后作业
名校
4 . 下图是一个机器人手臂的示意图.该手臂分为三段,分别可用向量
,
,
代表.
代表整条手臂,求
;
(2)求
所代表的点与原点之间的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4dba1805a326f85d0eca6430bc14fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56c6ef3478e21eeae9db1826f8bf110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f6d5dc6cb53c7fbfd34f0855da33e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec655f610928ca21831e26645a21e99c.png)
您最近一年使用:0次
2022-03-05更新
|
226次组卷
|
6卷引用:第06讲 空间向量及其运算的坐标表示 (1)
5 . 解答:
(1)已知
,
.若
,分别求
与
的值;
(2)已知三个向量
、
、
不共面,并且
,
,
,向量
、
、
是否共面?
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b328875c4b455bda66cf1979494340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945a6af0964e4180315f74a3a110fab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)已知三个向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbdd58a990fee1bfd5529e016372f20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee1fcd9b3bb3be5009deb8fcbb5bef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1433d69e05c52ba553bca6a0a1ce7c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bfbd2ef51eaeb6e686e27cc95638e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920a0d7029955d5df014d517248c8174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05883e6a0eae501d65ec13e90aa8aa09.png)
您最近一年使用:0次