1 . 已知椭圆Γ:
的右焦点坐标为
,且长轴长为短轴长的
倍,直线l交Γ椭圆于不同的两点
和
,
![](https://img.xkw.com/dksih/QBM/2020/12/24/2621114416979968/2623385264226304/STEM/8dcd37f5f04b48a4af764c5640e9e312.png?resizew=189)
(1)求椭圆Γ的方程;
(2)若直线l经过点
,且
的面积为
,求直线l的方程;
(3)若直线l的方程为
,点
关于x轴的对称点为
,直线
,
分别与x轴相交于P、Q两点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2020/12/24/2621114416979968/2623385264226304/STEM/8dcd37f5f04b48a4af764c5640e9e312.png?resizew=189)
(1)求椭圆Γ的方程;
(2)若直线l经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425ff352b0cf9389bbc2fb4538007066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
(3)若直线l的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1110f88d62c2b6415eed3f3f2965269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b763b6f4f86b652af33e33eeb6d91796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e8ac27d63ade4077fdcf7cf136cf71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668b55ec6c015b1afe1aabb38392a35.png)
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2020-12-27更新
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6卷引用:四川省泸县第五中学2022-2023学年高二上学期期末考试数学(理)试题