1 . 已知椭圆
过点
,且左焦点与抛物线
的焦点重合.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/d7e588e3-e34a-42df-956e-a460696c9ad3.png?resizew=198)
(1)求椭圆的标准方程;
(2)若直线
与椭圆交于不同的两点
、
,线段
的中点记为
,且线段
的垂直平分线过定点
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b1d1a896663d2259c7cb8a4287bc0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5545195ade2bda359e683715332e83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/d7e588e3-e34a-42df-956e-a460696c9ad3.png?resizew=198)
(1)求椭圆的标准方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becdcb8a871e8965853acf0687034c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e4d98f5192dc63f0164e94a9bb2704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2013·广东惠州·一模
2 . 已知中心在原点O,焦点在x轴上,离心率为
的椭圆过点
.
(1)求椭圆的方程;
(2)设不过原点O的直线与该椭圆交于P、Q两点,满足直线OP,PQ,OQ的斜率依次成等比数列,求
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d59419fff2c12efda787ef2c195af18.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/0bf60613-2af7-4294-b30f-3855ccdeebee.png?resizew=205)
(1)求椭圆的方程;
(2)设不过原点O的直线与该椭圆交于P、Q两点,满足直线OP,PQ,OQ的斜率依次成等比数列,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
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