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1 . 已知向量
,
,且
,则实数x等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788fa471d53a8be8dd55f561aecbf99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008ec1fce26f572709dc89228a81e18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89db934fbfbcb264cf37cafc0814e18.png)
A.10 | B.9 | C.8 | D.11 |
您最近一年使用:0次
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解题方法
2 . 已知
,
,
与
的夹角为60°,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78f978e74e4c2826c29c97a26e7e8533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02188c610c156e8a812ce3685efb90e4.png)
![](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/ff616fae63213934804b7811d21dbb49.png)
A.60 | B.50 | C.12 | D.30 |
您最近一年使用:0次
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3 . 已知α为第二象限角,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9bc052a11cf1a01445992672dde2836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-03-13更新
|
1144次组卷
|
3卷引用:2017年1月内蒙古自治区普通高中学业水平考试数学试题