题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094756-21026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094757-57894.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094757-84392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094757-54421.png)
(2)设向量
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094757-55022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094758-19333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094758-25397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094758-56584.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094758-28304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094759-42935.png)
解析
试题分析:(1)两向量相等即坐标相同,设出
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094759-75124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094759-80381.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094800-32638.png)
试题解析:⑴设
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094759-75124.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094800-85478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094800-62033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094800-77135.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094800-80496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094801-35426.png)
所以点
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094801-35669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094758-28304.png)
⑵因为
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094801-23126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094801-25173.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094802-41505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094802-23003.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094802-13382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094802-81488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094803-87715.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094759-42935.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094747-20418.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094748-90152.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094748-80443.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094748-56834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094748-45615.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094736-71477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094736-46599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094736-33075.png)
A.点M在线段AB上 |
B.点B在线段AM上 |
C.点A在线段BM上 |
D.O,A,M,B四点共线 |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094725-50468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094725-95882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094725-68729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094725-21864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094726-85534.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094725-21864.png)
A.2 | B.3 | C.4 | D.5 |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094715-48677.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094715-44291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094715-44291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103094715-88251.png)
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