1 . 已知向量
,
,且
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_______________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca9cf72f7e916a2fb628e7150e5d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb1d5d21f3c57b2723db7040a6c1e541.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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2021-11-21更新
|
367次组卷
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2卷引用:河南省名校大联考2021-2022学年高三上学期期中考试文科数学试题
2 . 已知向量
与
共线,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b886d17fe6d4dd4ed9481c9cdeb49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8445ea23db43352d21b0da6873a2059b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
A.![]() | B.2 | C.1 | D.![]() |
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2021-08-25更新
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2卷引用:河南省焦作市普通高中2020-2021学年高二下学期期中考试试题文科数学
解题方法
3 . 已知向量
,
,
.
(Ⅰ)求
;
(Ⅱ)若向量
是单位向量,且
与
共线,求
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6569e50f43b3d8645652ecc13b62066e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fda31d7cbc3ee5de962806c251afc2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1cc86b7ff004a6ab4f88b7af2d58da.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(Ⅱ)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441b83f50b3a9452693467b342b7ab04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec42c3751963b1ab1f0cf16df8701bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb573cc0f30d5c32cdad1510793f0e7b.png)
您最近一年使用:0次
名校
4 . 已知向量
,
,向量
.
(Ⅰ)若
,求
的值;
(Ⅱ)若
,求
,
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b195ebbc3f827355944bffe7e6b45f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa5abd1bd30045669bb6245db18bdcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9cf0c91d323a35144101eea242b770f.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a6a1d319648bb969845a9159cdba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
您最近一年使用:0次
2021-05-05更新
|
158次组卷
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3卷引用:河南省新乡市部分学校2020-2021学年高一下学期期中考试数学试题
名校
5 . 已知向量
,
,
(1)求
;
(2)当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff2b66f2fd178d97544a7c657d67c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a3b5d71bd7a1d1efe74811672ec7ee4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84455ce96bb8ec069286945271a1697.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dbd705bdfb8004f7c94a4e340474edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2020-06-08更新
|
458次组卷
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3卷引用:河南省郑州市第九中学2020-2021学年高一下学期期中数学试题