题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082817-32644.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082817-34686.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082818-26854.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082818-53215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082818-41448.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082818-20296.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082819-49874.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082819-37532.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082818-41448.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082819-11188.gif)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082820-23736.gif)
核心考点
试题【已知△三个顶点的坐标分别为,,,若,那么的值是A.B.C.D.】;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/20191104/20191104082810-80277.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082810-37529.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082811-95040.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082811-22985.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082811-66578.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082811-18669.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082810-80277.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082810-37529.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082811-73731.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082805-85790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082805-25808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082806-17798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082806-11987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082806-42393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082758-44645.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082758-26123.gif)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082759-43732.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082759-49344.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082759-88508.gif)
(Ⅱ)求(1)中
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082759-49344.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082750-86931.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082750-65551.gif)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082750-77429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082750-77429.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082750-21876.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082750-77429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082740-83534.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082740-83682.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082741-39982.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104082741-21940.gif)
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