题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053223-53118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053223-86432.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053224-51827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053224-74117.png)
A.b2-a2 B.a2-b2
C.a2+b2 D.ab
答案
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053224-86102.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053224-95704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053225-48599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053225-40754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053225-59500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053225-77624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053226-38365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053226-97385.png)
点评:本题考查向量在几何中的应用,考查向量的线性运算及向量的数量积公式,属于中档题.利用向量的线性运算及向量的数量积公式,即可得到结论.
核心考点
试题【如图,在四边形ABCD中,AB⊥BC,AD⊥DC.若||=a,||=b,则=A.b2-a2 B.a2-b2 】;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/20191104/20191104053217-97261.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053218-79210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053211-98076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053211-54080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-49014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-61980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053204-86191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-49014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-61980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053204-86191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053204-21707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-49014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-61980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053204-86191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-49014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-61980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053204-86679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-61980.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053204-86191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053205-37352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053203-49014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053204-86191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053205-83123.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
已知|
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-32158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-87667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-59773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-32158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-87667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-94369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053158-23018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053158-91773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053158-23018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053158-91773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053158-70202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-32158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053157-87667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053147-95938.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053147-91699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104053147-41736.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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