题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235158-79732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-24766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-88462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-96938.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-24766.png)
(1)求证:直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-28991.png)
(2)写出圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-24766.png)
(3)圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-24766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235200-92118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235200-98563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235200-87857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235200-62020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235200-11605.png)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-88462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235200-62020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235201-88113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235201-79371.png)
解:(1)直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-88462.png)
(2)要使圆
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-24766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235159-24766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235201-11051.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235201-21210.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235202-94408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235202-19260.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235202-45478.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235200-62020.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235202-30030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235201-88113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235203-50067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235203-32433.png)
核心考点
试题【在平面直角坐标系中,已知以为圆心的圆与直线恒有公共点,且要求使圆的面积最小.(1)求证:直线过定点,并指出定点坐标;(2)写出圆的方程;(3)圆与轴相交于两点,】;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
有一种大型商品,A、B两地都有出售,且价格相同,某地居民从两地之一购得商品后运回的费用是:A地每公里的运费是B地每公里运费的3倍. A、B两地距离为10公里,顾客选择A地或B地购买这件商品的标准是:包括运费和价格的总费用较低.已知P地居民选择A地或B地购物总费用相等.
(1)以A、B所在的直线为x轴,线段AB的中点为原点建立如图直角坐标系,试确定点P所在曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235148-33808.png)
(2)请说明(1)中曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235148-33808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235148-60423.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235131-53026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235131-54450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235131-24344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235131-98947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235132-82715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235131-24344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235132-82715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235131-53026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235132-43358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235132-79794.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235132-79080.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235132-82715.png)
(2)求证:经过
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235133-47318.png)
(3)求弦
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235133-73926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235114-89409.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235114-97969.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235114-49966.jpg)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235109-15781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235109-49192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235109-80644.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235105-75626.png)
(1)当弦AB的倾斜角为135°时,求AB所在的直线方程及|AB|;
(2)当弦AB被点P平分时,写出直线AB的方程。
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022235106-70459.jpg)
最新试题
- 1俄国1861年改革的最根本的目的是 [ ]A、巩固阶级统治,缓和阶级矛盾 B、扩大政权基础 C、发展资本主义 D
- 2下列词语中加点字的读音,完全相同的一组是 ( )A.否极泰来(pǐ) 前倨后恭(jù) 饮鸩止渴(zhèn)B.
- 3生物不会因为个体的死亡而导致物种灭绝,这是因为生物体具有( )A.生长特性B.繁殖特性C.遗传特性D.适应特性
- 4依次填入下列各句横线处的词语,最恰当的一组是( )①为了科学、有效地组织实施土地调查,保证土地调查数据的准确性和及
- 5若x+|x|=0,则x的取值范围是______;3(4-x)3=4-x,则x的取值范围是______.
- 6下列属于古代西方文明成就的是:[ ]A、B、C、D、
- 7下列不平等条约中,具有“开放广州、厦门、福州、宁波、上海”为通商口岸的是[ ]A.《南京条约》B.《北京条约》C
- 8下列各句中加粗的词语,使用不恰当的一项是[ ]A.小说通过典型的语言描写,把这几个有着不同性格的妇女形象惟妙惟肖
- 9已知点P在第四象限,且到x轴的距离为3,到y轴的距离为2,则点P的坐标一定是( )A.(-2,3)B.(2,3)C.(
- 10As you know, hundreds of jobs _____ if the factory closes.A.
热门考点
- 1某品牌糖衣片补血剂,除去糖衣后显淡蓝绿色,主要成分是硫酸亚铁,不含其它铁的化合物.某研究性学习小组为测定该补血剂中硫酸亚
- 2--- Goods imported from abroad are ________ those made in Ch
- 3—____ are they talking about? —The coming Father"s Day.A. Wh
- 4下列加线词读音全都相同的一项是( )A.拮据/倨傲熨帖/妥帖少不更事/亘古不变B.新正/症结隽永/狷介不屑一顾
- 5如图,在直角坐标系xOy中,一次函数y=k1x+b的图象与反比例函数的图象交于A(1,4)B(3,m)两点。 (1)求一
- 6下列语句中,没有错别字的一句是[ ]A. 一位代表激动地说,党的干部要敢于碰硬,要有为民造福的远大抱负,不能只想
- 7 《记承天寺夜游》一文中“寻张怀民”一句中的“寻”字用得好,你认为好在哪里?
- 8如图,两个半圆分别以P、Q为圆心,它们的半径相等,A1、P、B1、B2、Q、A2在同一条直线上.这个图形中的两个半圆是否
- 9下列关于重力和重心的说法,正确的是( )A.重力就是地球对物体的吸引力B.只有静止的物体才受到重力C.物体的重心只能在
- 10甲、乙、丙表示初中化学中常见的三种物质,其中一种物质为单质,另外两种物质的组成元素相同。其转化关系如下图所示:若甲为__