题目
题型:不详难度:来源:
已知直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-16818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-33560.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-83340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-23361.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-64263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-56808.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-23415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-16818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-83340.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151116-75037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151116-99245.png)
解析
试题分析:(1)由
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-64263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151116-12823.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151116-75037.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-23415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151116-63600.png)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151117-69257.png)
此时,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-16818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151117-28085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151115-83340.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151117-95976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151117-63231.png)
则它们之间的距离为
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151117-34586.png)
点评:掌握两直线的平行、垂直的条件及距离公式是解决此类问题的关键
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151109-23543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151109-69100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151109-98237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151109-14932.png)
A.2 | B.3 | C.9 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151104-98113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151104-16189.png)
A.![]() | B.![]() | C.![]() | D.3 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151100-92602.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151100-56409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151057-49679.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151057-11300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151058-24531.png)
已知直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151049-22154.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151050-24275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151050-23462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022151050-75085.png)
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