题目
题型:不详难度:来源:
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-94625.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-31694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-30256.gif)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-95147.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021133-20802.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021133-39181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021133-84680.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021133-60037.gif)
答案
(1)证明:(方法一)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021134-70373.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-94625.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-31694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021134-70620.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021134-51664.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021134-54057.gif)
(方法二)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021134-70373.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-94625.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-31694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021135-31379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021135-13192.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021135-12638.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021135-92508.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021134-54057.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021136-84376.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021136-68698.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021136-48749.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021136-90681.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021136-39484.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021137-50978.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021134-70373.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-94625.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-31694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021137-51989.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021137-26694.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021132-30256.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021137-68692.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021138-66775.gif)
解析
核心考点
试题【(本小题满分12分)已知向量,,其中。(1)求证:与互相垂直;(2)当时,求的值(为非零常数)。】;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/20191104/20191104021125-70674.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021126-57483.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021126-63768.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021126-60121.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021127-13196.gif)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021127-97434.gif)
(Ⅱ)当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021127-13531.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021127-18798.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021121-53478.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021111-42593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021112-82914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021112-42630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021112-82914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021112-52520.png)
A.(-![]() | B.(-![]() | C.(![]() | D.(![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021106-19992.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021107-94578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021107-40804.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021107-70677.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021103-79952.png)
A
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021103-85428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021103-36180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021104-76283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104021104-42062.png)
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