题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053106-48832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053106-52908.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053106-96201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053107-84150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053107-14632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053107-24255.png)
答案
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053107-14632.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053107-24289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053107-84150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053108-25036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053107-24255.png)
点评:(1)向量的平方就等于其模的平方;(2)熟记向量平行和垂直的条件,设
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053108-32691.png)
非零向量垂直的充要条件:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053108-34898.png)
向量共线的充要条件:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053109-44926.png)
核心考点
试题【若向量与的夹角是,,且 则 】;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/20191104/20191104053101-88486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053102-91739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053102-43101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053055-92890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053055-92649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053056-59554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053056-50642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053048-60031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053049-86674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053049-41023.png)
A.-![]() | B.-![]() | C.-2 | D.-![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-20173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-66034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-20173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-66034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-22155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-20173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-66034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-20173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053044-66034.png)
已知|
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053035-47663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053036-44306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053035-47663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053036-44306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053035-47663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053036-44306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053035-47663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053036-44306.png)
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