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已知平面向量,的夹角为60°,=(,1),||=1,则|+2|= .
已知平面向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354187817446/SYS201311031023541878174012_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354187817446/SYS201311031023541878174012_ST/1.png)
的夹角为60°,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354187817446/SYS201311031023541878174012_ST/2.png)
=(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354187817446/SYS201311031023541878174012_ST/3.png)
,1),|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354187817446/SYS201311031023541878174012_ST/4.png)
|=1,则|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354187817446/SYS201311031023541878174012_ST/5.png)
+2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102354187817446/SYS201311031023541878174012_ST/6.png)
|=
.
考点分析:
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