题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004538-91919.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004538-43994.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004539-80604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004539-41442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004539-35313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004539-39123.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004540-60736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004540-63582.png)
答案
解析
试题分析:根据椭圆的对称性可知
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004540-90633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004541-62096.png)
点评:本题考查了椭圆的定义,解题过程中结合图象,数形结合,会使得问题简单化,数形结合是数学中的重要思想.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004531-11672.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004532-78322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004532-19467.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004532-38297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004533-11275.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004532-19467.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004525-15402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004526-66612.png)
A.![]() | B.![]() ![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
设点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004508-15741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004508-24702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004509-42403.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004509-86161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004509-86055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004509-13657.png)
(Ⅰ)求曲线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004509-13657.png)
(Ⅱ)设
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004510-25920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004510-96046.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004510-97320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004509-13657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004510-11337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004511-55651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004511-42358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004510-97320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004501-57391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004501-74383.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004502-54873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026004502-65816.png)
A.7 | B.![]() | C.6 | D.5 |
A.![]() | B.![]() | C.![]() | D.![]() |
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