题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181952-22835.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181952-22835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181953-42205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181953-69152.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181953-50997.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181953-69681.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181952-34341.png)
点评:要得到抛物线的性质,需将抛物线的方程化为标准形式。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181931-16301.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181931-98743.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181931-34163.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181932-22182.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181932-22630.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181921-32585.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181922-96005.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181922-48422.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181922-48168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181922-70212.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181923-17125.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181751-86629.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181751-32285.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181751-54444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181751-54444.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181752-14381.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181752-34975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181752-48714.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181752-85516.gif)
(Ⅰ)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181752-34975.gif)
(Ⅱ)已知菱形ABCD的顶点A﹑C在椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181752-34975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181752-33275.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181748-49475.gif)
A.(0,![]() | B.(0,![]() | C.(![]() | D.(![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181746-88790.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025181746-24367.gif)
轴的距离为( )
A.0 | B.1 | C.2 | D.4 |
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