题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003922-27139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003923-34479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003923-18116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003923-26873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003924-13563.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003924-66781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003924-63355.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003924-42092.jpg)
(1)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-26639.png)
(2)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-26639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-92948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-86832.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-76045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003926-94639.png)
解析
试题分析:解: (1)因为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003924-66781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003926-23292.png)
从而得
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003926-86827.png)
所以直线BD的方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-76045.png)
(2)线段BP的垂直平分线方程为x=0,线段AP的垂直平分线方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003926-62426.png)
所以圆C的圆心为(0,-1),且圆C的半径为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003927-93351.png)
又圆心(0,-1)到直线BD的距离为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003927-91997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-26639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003925-86832.png)
为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003926-94639.png)
点评:解决的关键是利用直线与圆的位置关系的判定法则,圆心到直线的距离与圆的半径的关系来得到求解,属于基础题。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003917-78502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003917-96577.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003903-26713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003903-21803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003903-35159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003903-62228.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003903-43841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003904-12783.png)
(Ⅰ)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003904-24764.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003904-21223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003904-76676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003904-23924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003904-98312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003904-37991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003856-69857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003856-50101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003856-92682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003856-67298.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003849-55352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003849-23896.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003844-26036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003844-38456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003844-13979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026003844-39450.png)
最新试题
- 1下列变化属于物理变化的是A.酒精挥发B.牛奶变酸C.蔬菜腐烂D.高粱酿酒
- 2如图,边长为2的正方形中,(1)点是的中点,点是的中点,将分别沿折起,使两点重合于点。求证:(2)当时,求三棱锥的体积。
- 3根据句意和汉语注释,在横线上写出单词的正确形式。小题1:While I was doing an ___________
- 4The opponents(对手) were ________ the ball for most of the mat
- 5种子萌发必须具备的外界条件是水分、温度和空气______.
- 6 ______ it be true that we will have to wait for 3 hours in
- 7“中华牌”月球车将登陆月球并实施无人探测计划.当月球上为白天时,月球车上的太阳仪可以自由旋转寻找太阳的位置.然后将___
- 8函数y=ln|x-1|的图象与函数y=-2cosπx(-2≤x≤4)的图象所有交点的横坐标之和等于( )A.8B.6C
- 9下列文学常识表述正确的一项是[ ]A、《从百草园到三味书屋》、《雪》、《藤野先生》都是选自鲁迅的散文集《朝花夕拾
- 10__________go shopping with us?[ ]A. What about B. How
热门考点
- 1我国股市交易中每买、卖一次需交0.75%的各种费用,某投资者以每股10元的价格买入某股票a股,当该股票涨到12元时全部卖
- 2中共十一届三中全会后城市经济体制改革中心环节是( )A.调动职工积极性B.按劳分配C.增强企业活力D.实施“走出去”战
- 3请听下面一段对话,回答第1至3小题。 1. What size does the man"s son wear? A.
- 4下列计算正确的是[ ]A.B.C.(-1)×(-2)=-2D.-1+2=-3
- 5Plants need water and sunlight to grow well. _____, a health
- 6在市场经济条件下,引起物价上涨的因素很多,原因很复杂,其中主要有( )①纸币贬值 ②商品供求关系发生变化,供不应求 ③
- 7深圳卫视大型综艺节目《年代秀》结合影像、实物、音乐、表演等元素,展现不同年代的不同流行,使不同年代的人们都能从中找到属于
- 8在照相机和摄影机的前面都安装有一个镜头,这实际上就是一个凸透镜,它成的是_________、_________、____
- 9下列不属于基础工业的是[ ]A、煤炭工业 B、石油工业 C、电力工业 D、纺织工业
- 10秦统一全国的各因素中,最主要的是 A.长期战乱,人民渴望统一B.秦国国富民强而六国衰落C.经济发展,各地区联系加强D.秦