真题
1 . 设
,向量
,若
,则![](https://img.xkw.com/dksih/QBM/2014/6/23/1571791924559872/1571791930310656/STEM/72b89135568343189387e31c06aa3488.png?resizew=49)
______ .
![](https://img.xkw.com/dksih/QBM/2014/6/23/1571791924559872/1571791930310656/STEM/ec49069c75e742cfb16d42d72b43931d.png?resizew=67)
![](https://img.xkw.com/dksih/QBM/2014/6/23/1571791924559872/1571791930310656/STEM/e8c9b8965cdb41139e0daf5b739525ad.png?resizew=209)
![](https://img.xkw.com/dksih/QBM/2014/6/23/1571791924559872/1571791930310656/STEM/2b6c5bc4d097432bb4b53fbee41ee6d0.png?resizew=53)
![](https://img.xkw.com/dksih/QBM/2014/6/23/1571791924559872/1571791930310656/STEM/72b89135568343189387e31c06aa3488.png?resizew=49)
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2016-12-03更新
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3卷引用:2014年全国普通高等学校招生统一考试文科数学(陕西卷)