题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012637-81022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012637-24684.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012637-81022.png)
①给定向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-25240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-12130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-37895.png)
②给定向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-25240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-12130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-33452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-50310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-19858.png)
③给定单位向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-25240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-50310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-12130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-33452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-19858.png)
④给定正数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-33452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-50310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-25240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-12130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-19858.png)
上述命题中的向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-25240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012638-12130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012637-81022.png)
A.1 | B.2 | C.3 | D.4 |
答案
解析
试题分析:利用向量加法的三角形法则,易知①正确;利用平面向量的基本定理,易知正确;以
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012637-81022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-50310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-86892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012639-77825.png)
核心考点
试题【设是已知的平面向量且,关于向量的分解,有如下四个命题:①给定向量,总存在向量,使;②给定向量和,总存在实数和,使;③给定单位向量和正数,总存在单位向量和实数,使】;主要考察你对平面向量的基本定理及坐标表示等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012632-69177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012632-42733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012632-59716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012632-97948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012632-55116.png)
A.4 | B.3 | C.2 | D.0 |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012626-46812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012626-93302.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012627-47662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012627-48483.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012618-69700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012618-50026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012618-96569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012612-96489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012612-14674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012612-98986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012613-44705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012606-30704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012606-90702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012606-48050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104012607-33496.png)
A.4 | B.5 | C.![]() | D.![]() |
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