1 . 设
,且
.
(1)求
和![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622977024/STEM/b9f7b264096e424baa2208e764459850.png)
(2)求
在
方向上的投影
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622977024/STEM/7a8dd1fbe35645618b34b73a9ead6e0c.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622977024/STEM/110fdea4ee4f41418d784b2b66803668.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622977024/STEM/5cd199fd3207464ca144a9e046bfb9be.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622977024/STEM/b9f7b264096e424baa2208e764459850.png)
(2)求
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622977024/STEM/b9f7b264096e424baa2208e764459850.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622977024/STEM/d470455138a94587868a63169749f718.png)
您最近一年使用:0次
名校
解题方法
2 . 下列向量组中,能作为表示它们所在平面内所有向量的基底的是( )
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
2016-12-03更新
|
934次组卷
|
4卷引用:四川省资阳中学2017-2018学年高一下学期3月月考数学试题
3 . 在
中,点D,E分别是边AB,AC上的一点,且满足
,
,若
,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc718b99fb52f53f988c91d8fc94dbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa61d9f35c4160f319e77be88c7f033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a0d2a2415ec1e1374ac46bc232f450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 如图,菱形ABCD的边长为1,
,E、F分别为AD、CD的中点,则
=_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a73a304056c14d2dfde205719f0fb2.png)
![](https://img.xkw.com/dksih/QBM/2015/7/8/1572172167487488/1572172173205504/STEM/52788b0b311b43349aa8380be67b23a9.png?resizew=157)
您最近一年使用:0次
2016-12-03更新
|
1075次组卷
|
3卷引用:四川省资阳市乐至县宝林中学2019—2020学年高一上学期期末数学模拟试题
解题方法
5 . 如图
为互相垂直的两个单位向量,则
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/15a18943-1cdb-40de-b4d8-8fe1f7707914.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111939547e581e8bf029a241b9e9cb05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e912b86e064e678ab34210f3fa02ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/15a18943-1cdb-40de-b4d8-8fe1f7707914.png?resizew=178)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 平面向量
,
,若
与
共线,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9be6af52b3750444293efde2b9ba184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da4cde86e6e95df4bc6038de7276185e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622583808/STEM/32da7fe4a5cd49a08ffeefc21f91abfe.png)
![](https://img.xkw.com/dksih/QBM/2016/9/8/1573008617037824/1573008622583808/STEM/49931ecbde0f4f9aa097a28965fc7618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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13-14高三上·四川资阳·阶段练习
7 . 在平面直角坐标系中,若点
,
,
,则![](https://img.xkw.com/dksih/QBM/2014/2/17/1571509416247296/1571509421891584/STEM/d185e7bba4144572ba66054538d9a732.png?resizew=75)
________ .
![](https://img.xkw.com/dksih/QBM/2014/2/17/1571509416247296/1571509421891584/STEM/c398ce4a93d34f469be8b156457f4366.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2014/2/17/1571509416247296/1571509421891584/STEM/1f5e7f5cb2994a369df0edb800d7f77e.png?resizew=42)
![](https://img.xkw.com/dksih/QBM/2014/2/17/1571509416247296/1571509421891584/STEM/5603026143d143e0baf32752340d7f80.png?resizew=50)
![](https://img.xkw.com/dksih/QBM/2014/2/17/1571509416247296/1571509421891584/STEM/d185e7bba4144572ba66054538d9a732.png?resizew=75)
您最近一年使用:0次