题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141436-61672.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141436-92375.png)
解析
试题分析:直线2x+y-4=0与x轴、y轴的交点分别为(2,0)、(0,4),则c=2,|F2N|=2,
∵|MN|=|MF1|,∴|MF2|+|MF1|=|F2N|=2a,即a=,∴椭圆E的方程为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141436-92375.png)
核心考点
试题【已知直线2x+y-4=0过椭圆E:的右焦点F2,且与椭圆E在第一象限的交点为M,与y轴交于点N,F1是椭圆E的左焦点,且|MN|=|MF1|,则椭圆E的方程为 】;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/20191023/20191023141423-93334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141423-49121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141423-66637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-54405.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141423-49121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141423-49121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-70174.png)
(1)求轨迹
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-70174.png)
(2)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-41769.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-75182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-53973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-70174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141425-69488.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141425-79689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141425-66915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141423-49121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141424-53973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141425-73442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141426-35014.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141426-31245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141426-64447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141406-54236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141406-27520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141406-37263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141406-50897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141407-76094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141406-37263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141407-54669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141407-29789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141407-13131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141406-37263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141408-33718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141408-48143.png)
(1)求椭圆的标准方程;
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141408-68927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141408-51068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141409-45106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141356-12219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141357-52155.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141350-92336.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141351-20699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141351-22094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141351-44739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141351-49154.png)
A.16 | B.25 | C.9 | D.不为定值 |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141342-75995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141343-67825.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141343-55784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141343-10481.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141343-43161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141343-17037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141344-73421.png)
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