题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043955-99038.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043956-91470.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043955-99038.gif)
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答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043957-14899.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043957-18234.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043957-36900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043957-96979.gif)
两式相加整理,得
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043957-54113.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043957-99511.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043958-81813.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043958-69365.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043956-44447.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043958-56575.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043958-11150.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043955-99038.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043958-43033.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043959-17720.gif)
由⑥⑦解得
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043959-28907.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043959-91431.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043959-75118.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043959-27946.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044000-18449.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026044000-47211.gif)
核心考点
试题【已知椭圆的中心在原点,焦点在轴上,右准线的方程为,倾斜角为的直线交椭圆于两点,且的中点坐标为,设为椭圆的右顶点,为椭圆上两点,且,,三者的平方成等差数列,则直线】;主要考察你对曲线与方程的应用等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026043946-65951.gif)
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