题目
题型:不详难度:来源:
已知圆C:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-85271.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-78769.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
(2)当弦AB被点P平分时,求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
(3)求过点(4,3)且与圆相切的直线方程
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
得直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041251-26724.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041251-89199.gif)
(2)由题意得CP
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041251-48412.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041251-29783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041252-17563.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041251-29783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041252-84132.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041252-87803.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041252-75727.gif)
(3)当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041252-48256.gif)
当直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041250-66605.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041253-28083.gif)
解析
核心考点
试题【已知圆C:内有一点P,过点P作直线交圆C与A,B两点 (12分)(1)当经过圆心C时,求直线方程(2)当弦AB被点P平分时,求直线方程(3)求过点(4,3)且与】;主要考察你对圆的方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041243-26769.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041237-33743.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041237-65281.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041237-18685.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041237-88436.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041237-88436.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041238-32677.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041238-77379.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041224-22141.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041224-12833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041225-67596.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041225-32397.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041225-74965.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041225-35663.gif)
(1)求矩形
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041224-22141.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041225-42833.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041226-42879.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041225-42833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041226-95842.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041226-22203.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023041226-76755.gif)
A.(x+3)2+(y+2)2=2 | B.(x+3)2+(y+2)2=![]() |
C.(x+3)2+(y-2)2=2 | D.(x+3)2+(y-2)2=![]() |
A.x2+y2-2x+4y=0 | B.x2+y2+2x+4y=0 |
C.x2+y2+2x-4y=0 | D.x2+y2-2x-4y=0 |
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