题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050501-67687.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050501-35948.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050502-38548.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050502-65254.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050502-95435.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050502-24700.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050502-98673.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050503-77579.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050503-64510.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050503-38935.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050502-98673.gif)
(2)设点A、B、M的坐标分别为(x1,y1),(x2,y2),(0,y0),易知点F的坐标为(2,0)。
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050503-36783.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050504-70753.gif)
将点A坐标代入椭圆方程得
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050504-22028.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050504-27211.gif)
同理,
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050504-35997.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050504-97593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050505-53779.gif)
由①-②可知
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050505-32716.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050505-25560.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050503-77579.gif)
核心考点
试题【(本小题12分)已知椭圆C的焦点在x轴上,它的一个顶点恰好是抛物线的焦点,离心率。(1)求椭圆的标准方程;(2)过椭圆C的右焦点作直线交椭圆C于A、B两点,交y】;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/20191026/20191026050451-70777.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050451-12435.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050451-16841.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050451-69954.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050451-83251.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050452-22877.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050452-95259.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050451-70777.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050452-70354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050452-95259.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050452-33807.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050453-51276.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050453-88422.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050453-94221.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050453-56755.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050451-70777.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050453-90906.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050451-70777.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050438-60045.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050438-29987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050438-40487.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050438-96578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-92771.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-21901.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-21231.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-28215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050440-48912.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050438-60045.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-21231.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-28215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050440-17503.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050440-48756.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050440-13953.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-21231.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050440-48212.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050441-93337.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050439-21231.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050438-60045.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050441-19033.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050438-60045.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050426-93204.gif)
已知曲线C上的动点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050426-60584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050426-57823.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050426-73004.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050426-42209.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050427-58059.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050427-61395.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050427-21478.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050427-51284.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050427-10098.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050428-42430.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050428-91128.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050428-71441.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050414-22480.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050414-71525.gif)
(1)求抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050414-80801.gif)
(2)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050414-50464.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050414-48444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050415-56162.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050414-80801.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050415-95341.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050415-13415.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050415-43351.gif)
(3)在(2)的前提下,若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050415-96361.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050416-19485.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050402-69181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050402-16955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050403-59040.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050403-50310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050403-98262.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050403-64806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050404-38089.gif)
(1)求椭圆C的方程;
(2)是否存在直线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050403-64806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050404-55665.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050403-64806.gif)
(3)若AB是椭圆C经过原点O的弦, MN
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050404-68494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026050404-17243.gif)
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