题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202229-47702.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202229-87767.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202229-96039.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202230-43607.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202230-90349.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202230-33521.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202230-90349.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202230-99579.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202231-63699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202231-26466.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202232-54940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202232-32294.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202232-33294.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202232-81316.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202233-75071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202233-42114.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202234-66310.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202234-70240.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202231-63699.gif)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202234-41526.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202230-90349.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202234-20818.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202235-46751.gif)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202234-20818.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202231-63699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202235-53165.gif)
由点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202234-41526.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202235-22173.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202236-46628.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202236-43922.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202236-15707.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202236-25295.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202237-67512.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202237-33190.gif)
又∵NA、NB与
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202230-99579.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202237-53474.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202237-27876.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202238-73272.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202238-91176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202231-26466.gif)
核心考点
试题【(本小题满分12分)标准椭圆的两焦点为,在椭圆上,且. (1)求椭圆方程;(2)若N在椭圆上,O为原点,直线的方向向量为,若交椭圆于A、B两点,且NA、NB与】;主要考察你对椭圆的定义与方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202216-30497.gif)
(1)若椭圆C上的点A(1,
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202216-10604.gif)
(2)设点P是(1)中所得椭圆上的动点,当P在何位置时,
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202216-39926.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202208-42247.gif)
(1)求椭圆的离心率;
(2)若平行四边形OCED的面积为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202208-59944.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202208-16881.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202200-58333.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202201-94782.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202201-30494.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202201-50402.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202201-17359.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202202-98253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202145-41250.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202145-14998.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202146-45902.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202146-89458.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202146-37941.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202146-35987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202146-72474.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202147-65750.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202147-18127.gif)
(1)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202147-85323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202147-22139.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202148-85524.gif)
(2)设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202147-65750.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202147-85323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202148-35880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202148-89777.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202122-45235.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202123-72743.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202123-29030.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202123-56253.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023202123-34844.gif)
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