题目
题型:不详难度:来源:
(1)求直线l1被圆O所截得的弦长;
(2)如果过点(-1,2)的直线l2与l1垂直,l2与圆心在直线x-2y=0上的圆M相切,圆M被直线l1分成两段圆弧,其弧长比为2∶1,求圆M的方程.
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014718-54882.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014718-69708.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014718-27027.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014718-32620.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014718-54882.gif)
(2)直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014718-60207.gif)
设圆心
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014719-93889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014719-47067.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014719-93889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014719-56052.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014719-89926.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014719-93889.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014720-73533.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014720-78300.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014720-34511.gif)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014720-28255.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014721-69986.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014721-29340.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014721-18228.gif)
或
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014721-30222.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014718-69708.gif)
核心考点
试题【已知直线l1:3x+4y-5=0,圆O:x2+y2=4.(1)求直线l1被圆O所截得的弦长;(2)如果过点(-1,2)的直线l2与l1垂直,l2与圆心在直线x-】;主要考察你对点到直线的距离等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014713-68958.gif)
A.2条 | B.3条 | C.4条 | D.6条 |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014707-46752.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014707-28474.gif)
集合
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014707-66249.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014708-22730.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014655-99016.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014656-60728.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014656-16084.gif)
(1) 求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014656-44965.gif)
(2) 设抛物线与x轴的交点从左到右分别为A、B,与y轴的交点为C,求A、B、C三点的坐标;
(3) 设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014656-83194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014656-83194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014656-16084.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014651-85772.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014651-35800.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014651-27853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023014647-44777.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
最新试题
- 1下列各组物质中,不互为同素异形体的是( )A.金刚石和C60B.红磷和P4C.O2和O3D.1H和2H
- 2Would you like _______ his sister _______ your party? [
- 3—________ is it from his home to school?—About 20 minutes" w
- 4针对一段时间以来频频发生的食品安全问题,为了从源头上消除食品安全隐患,规范食品生产经营市场秩序,让人民吃的安心、放心,2
- 5在如下程序框图中,输入,则输出的是__________
- 6为方便少数民族群众的消费维权,内蒙古呼伦贝尔市工商局2010年3月15日组织的“送法下乡”活动印发了蒙汉两种文字的《消费
- 7如图所示,已如AB是⊙O的直径,⊙O的切线PA与弦BC的延长线相交于点P,∠PBA的平分线交PA于点D,∠ABC=30°
- 8下列物质的化学式书写不正确的是A.氧化铝 Al2O3 B.碳酸钠 Na2CO3C.氢氧化钙 Ca(OH)2D.氯化铁 F
- 9下列运算正确的是 [ ]A.
- 10Either the driver killed in the car or the lucky passenger q
热门考点
- 1已知的平均数为a,标准差是b,则的平均数是 _____, 标准差是 ________.
- 2若向量a=(4,2,-4),b=(1,-3,2),则2a-(a+2b)=______.
- 3胃对食物只具有物理性消化作用,没有化学性消化作用。 ( )
- 4下列各项中:①原子的数目,②分子数目,③元素的种类,④物质的质量,⑤物质的种类,在化学变化中,肯定没有变化的是 [
- 5听下面9段对话。每段对话后面有一个小题,从题后所给的A、B、C三个选项中选出最佳选项。( )1. A. A ha
- 6若数列{}是等差数列,a3,a10是方程x2﹣3x﹣5=0的两根,则a5+a8=( ).
- 7在平面直角坐标系中,“直线,与曲线相切”的充要条件是 .
- 8下列成就在“八六三计划”制定之后取得的是[ ]A.第一颗原子弹爆炸成功B.第一颗人造地球卫星发射成功C.籼型杂交
- 9(26分)发生在20世纪的两次世界大战深刻影响了中国历史的进程。阅读材料,回答问题。材料一 不佞垂老亲见……欧罗巴四年
- 10— What about the price of petrol now? — It has been ______ 2