题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220351-34487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220351-15186.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220351-90350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220352-75251.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220352-70657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220352-82321.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220352-12886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220353-60830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220353-69895.png)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220353-19048.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220353-60830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220353-57217.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-39990.png)
(3)在(2)的椭圆中,过
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-20472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-97127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-39990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-21664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220355-22862.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220355-63108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-97127.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220355-40192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220355-16657.png)
解析
试题分析:(1)由条件知M点的坐标为(c,y0),其中|y0|=d,知
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-83148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-34624.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-28557.png)
(2)由条件知c=
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
(3)设点A(x1,y1)、B(x2,y2),当l⊥x轴时,A(-
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220357-81068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-97127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-97127.png)
试题解析:(1)证明:由条件知M点的坐标为
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220357-72194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220357-14917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220357-11276.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220358-72760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220358-15502.png)
(2)由条件知
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220358-88205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220358-99609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220359-39990.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220359-93392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220355-40192.png)
(3)设点A(x1,y1)、B(x2,y2),当l⊥x轴时,A(-
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220357-81068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220354-97127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220356-55824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220359-89960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220355-63108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220359-15241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220400-64049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220400-72282.png)
所以直线l的方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220355-16657.png)
核心考点
试题【已知为椭圆的左右焦点,是坐标原点,过作垂直于轴的直线交椭圆于,设 .(1)证明: 成等比数列;(2)若的坐标为,求椭圆的方程;(3)在(2)的椭圆中,过的直线与】;主要考察你对曲线与方程的应用等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220327-99922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220327-77229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220328-11559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220328-43163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220328-61962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220328-94290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220329-46658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220329-69939.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220329-46243.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220329-42552.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220329-46243.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220330-59146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220330-41222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220330-55512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220330-94615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220330-36698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220313-67284.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220313-12305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220313-76577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220313-12305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220314-82877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220314-10958.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220314-31464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220314-31464.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220315-31205.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220315-84007.png)
(2)设动直线
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220315-52186.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220315-84007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220315-39049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220316-88997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220316-48676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220316-64603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220316-50485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220306-33970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220306-47727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220307-61556.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220307-56192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220307-81376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220307-61556.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220253-33030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220253-31732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220253-28946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220253-33030.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220253-33030.png)
(2)已知直线
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220254-70224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220254-66983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220254-70224.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220253-33030.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220254-19593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220254-52590.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220254-64146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220241-47695.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-38096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-91207.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-88639.png)
(2)设不与坐标轴平行的直线
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-57384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-88639.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-64060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-68032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220242-52749.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220243-38309.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025220243-66832.png)
最新试题
- 1The producer comes regularly to collect the cameras _______
- 2以下对人体消化和吸收的认识合理的是A.胃可初步消化蛋白质、脂肪B.胆汁中不含消化酶,对食物消化不起作用C.肠液和胰液中含
- 3的相反数是( )A.B.-C.2D.-2
- 4阅读下面选文,回答问题。 操不顾,策马便行。行不数步,忽拔剑复回。叫伯奢曰:“此来者何人?”伯奢回头看时,操
- 5数列的前n项和记为,前项和记为,对给定的常数,若是与无关的非零常数,则称该数列是“类和科比数列”,(理科做以下(1)(2
- 6根据所给词的适当形式填空。1. Daniel ________ (not want) a new computer.2.
- 7为响应学校“‘光盘’行动进校园”的倡议,初三⑵班准备出一期以“让‘光盘’成为我们的时尚”为主题的宣传板报,请你完成下列任
- 8西汉政府在西域设置的总管西域事务,保护商旅往来的机构是[ ]A.西域都护 B.安西都护府 C.北庭都护府
- 9受自然条件影响较大的运输方式是______,它的优点是______.
- 10向一体积不变的密闭容器中加入2mol A、0.6molC和一定量的B三种气体。一定条件下发生反应,各物质浓度随时间变化如
热门考点
- 1如图所示,质量为m的金属环用线悬挂起来,金属环有一半处于水平且与环面垂直的匀强磁场中,从某时刻开始,磁感应强度均匀减小,
- 2下图中学生的家长[ ]A.严格教子,有利于孩子的健康成长 B.正确履行了对子女的教育义务 C.正确行使了教育
- 3— Is my answer to the math problem right?— Let me consider i
- 4如图所示,在一个直立的光滑管内放置一个轻质弹簧,上端O点与管口A的距离为2x0,一个质量为m的小球从管口由静止下落,将弹
- 5阅读甲、乙两则文字,完成下面问题。甲 陈亢问于伯鱼曰:“子亦有异闻乎?” 对曰:“未也。尝独立,鲤趋而过庭。曰:‘学
- 6(10分)阅读下列材料材料一 16至17世纪的中国,新的经济形态还十分微弱、脆嫩,明清时期的早期启蒙思想家们先天不足,…
- 7在我们所创造的财富中有一部分是利用生态资源换来的,即所谓的生态赤字。近十多年来,我国的生态赤字已占总财富的21.8%,每
- 8某地13名初中生的父母为了眼前利益,给他们在一乡镇企业报了名,让他们辍学打工。13名学生联名状告父母,当地教育部门和执法
- 9近年来,“蒜你狠”、“豆你玩”、“姜你军”、“糖高宗”等网络新词随着物价飞涨迅速流行。这些新词的产生源于A.人们的主观创
- 10如果让你沿着右图中的史实续写历史,那么,正确的史实应该包括①“临朝不理政”的君主出现了②资产阶级包揽了帝国中的全部军政要