题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074343-56593.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074344-50844.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074343-56593.gif)
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答案
解析
核心考点
试题【已知向量和向量的夹角为,∣∣=2,∣∣=,则向量和的数量积 ;】;主要考察你对平面向量数量积的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074339-42565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074339-97019.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074327-45853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074327-18139.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074328-94305.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074328-25855.gif)
A.30° | B.60° | C.120° | D.150° |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074321-19565.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074321-19871.gif)
A.7 | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074316-30635.gif)
①
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074317-13660.gif)
②
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074317-47655.gif)
③
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074317-97553.gif)
④两单位向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074317-84133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074318-65872.gif)
⑤将函数y=2x的图象按向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074318-49096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074318-49096.gif)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074310-50008.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074311-59318.gif)
②若A(x1,y1),B(x2,y2),则
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074311-24368.gif)
③已知
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074311-74222.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074311-64742.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-21968.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-58591.gif)
④已知λ1>0,λ2>0,e1,e2是一组基底,
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-18216.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-78632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074313-89635.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-18216.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-78632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-18216.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074313-89635.gif)
⑤
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074312-18216.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074313-93786.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074313-98869.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074313-46425.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104074314-66947.gif)
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