题目
题型:不详难度:来源:
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答案
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故
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故答案为:
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核心考点
试题【已知向量a与向量b的夹角为120°,若向量c=a+b,且a⊥c,则|a||b|的值为______.】;主要考察你对平面向量数量积的运算等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104105752-76270.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104105752-73068.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104105752-94956.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104105752-10204.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104105752-94956.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104105752-10204.jpg)
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