题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013544-41012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013545-85861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013545-82629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013545-97604.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013545-45251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013546-30664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013546-66205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013546-34625.png)
答案
解析
试题分析:取DE中点G,连接FG,
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013546-95975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013547-92811.png)
点评:向量加减法遵循三角形法则,加法的三角形法则:将向量首尾相接,由最初的起点指向最末的中点的向量为其和向量,减法的三角形法则:将两向量起点重合,连接中点构成的向量(方向指向被减向量)为两向量的差向量
核心考点
试题【在平行四边形ABCD中,E、F分别是BC、CD的中点,DE交AF于H,记、分别为,则=( )A. B. C. D. 】;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/20191104/20191104013539-94419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013539-35463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013539-49210.png)
A.![]() | B.![]() | C.![]() | D.![]() |
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-17251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-10753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-10753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-58958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-17251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-58958.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013535-24726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013535-51297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013535-73547.png)
(3)对任意向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013535-19597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013536-26323.png)
(4)若存在
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013536-42406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013536-38075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-17251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-10753.png)
(5)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-17251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-10753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013536-42406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013536-38075.png)
(6)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013536-14236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-17251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013534-10753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013537-98395.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013528-44746.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013528-11020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013528-28194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013520-85181.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013521-84997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013521-23762.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013521-47864.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013516-10199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013516-57965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104013517-71211.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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