题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021124-49400.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-12262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-88994.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-79274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-17714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-59740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-21642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-60616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-14222.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-71244.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021126-26157.png)
解析
试题分析:由于O、A、B三点在一条直线上,则
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021126-50134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021126-99213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021126-49659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021126-50627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021126-87834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-21642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021127-23755.png)
联立方程组解得
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021125-71244.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021126-26157.png)
点评:解决此类问题的关键是熟练掌握向量共线、垂直等的坐标运算,并能灵活运用
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021114-96146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021115-40134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021115-47996.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021115-72464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021115-64026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021115-62695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021115-89740.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021115-15786.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021107-51112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021107-29366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021107-93458.png)
求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021108-72593.png)
(2) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021108-47658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021108-72593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021108-72593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021108-56724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021059-83183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021100-72185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021100-15658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021100-20438.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021100-19061.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021101-97242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021100-19061.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021052-69103.png)
(2)求向量
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021052-74430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021052-97262.png)
(3)试求与
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021052-98300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021045-69948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021045-52132.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021045-49906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021045-93304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105021046-14294.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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