题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-53840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-99379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-88545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-44555.png)
(1)求圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
(2)求过点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-44139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-86277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-62517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-68599.png)
解析
试题分析:(1)先联立直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-92951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-53840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024758-50984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-44139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-44139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024758-97357.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-44139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024758-98532.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024758-92195.png)
试题解析:(1)因为圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-99379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-88545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024756-44555.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024759-79639.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024759-72715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024759-68588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024759-83238.png)
半径
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024800-38201.png)
所以圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-62517.png)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-44139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-44139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024800-83997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024800-29919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024800-97199.png)
故过点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-44139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-86277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024755-71014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024757-68599.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024749-64986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024749-53263.png)
A.1 | B.4 | C.5 | D.6 |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024745-77204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024745-84219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024738-86078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024739-84022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024739-90427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024739-90427.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024734-38599.png)
A.[1,+∞) | B.[-1,-![]() | C.(![]() | D.(-∞,-1] |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024727-11794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024727-94924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024727-70166.png)
(Ⅰ)当圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024727-11794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024727-11794.png)
(Ⅱ)若圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024727-11794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024728-79606.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023024727-11794.png)
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