题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220520-38616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220520-95634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220520-93179.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220520-66612.png)
解析
试题分析:如图曲线表示
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220521-76049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220521-77123.jpg)
如图,加在两条直线之间的直线与半圆有两个交点,利用圆心到直线距离等于半径,求相切的直线的纵截距,
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220521-97253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220522-64161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220522-29654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220520-93179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220520-66612.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220513-66107.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220514-85614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220514-17533.png)
A.6 | B.4 | C.3 | D.2 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220507-80594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220507-54255.png)
A.相切 | B.相离 | C.相交 | D.不确定 |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220454-70300.png)
(1)求直线y=ax+b不经过第四象限的概率:
(2)求直线y=ax+b与圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220454-14915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220440-34820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-26242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-82918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-26242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-96308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-75551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220442-84677.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-82918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-26242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220442-65935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220442-93471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220442-33347.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220443-21029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220441-96308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022220443-46251.png)
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