题目
题型:不详难度:来源:
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答案
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解析
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![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141112-64034.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141113-59189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023141113-59189.png)
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核心考点
试题【已知F1、F2分别是椭圆=1(a>b>0)的左、右焦点,A、B分别是此椭圆的右顶点和上顶点,P是椭圆上一点,O是坐标原点,OP∥AB,PF1⊥x轴,F1A=+,】;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
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(1)若∠F1AB=90°,求椭圆的离心率;
(2)若
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