已知点
是椭圆
:
上异于顶点的动点,
,
分别为椭圆的左、右焦点,
为坐标原点,
为
的中点,
的平分线与直线
交于点
,则四边形
的面积的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b67528f875a6d4bac8bbf784f7b66a0.png)
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2022高三·全国·专题练习 查看更多[5]
(已下线)专题4 求面积运算(提升版)(已下线)专题41 直线与圆锥曲线-2湖南省常德市第一中学2022-2023学年高二下学期期中数学试题辽宁省沈阳市东北育才学校2023-2024学年高二上学期期中数学试题(已下线)专题17 圆锥曲线常考压轴小题全归类(16大题型)(练习)
更新时间:2022-09-19 20:39:31
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【知识点】 椭圆中三角形(四边形)的面积
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【推荐1】如图,已知点
为椭圆
在第一象限内的任意一点,过椭圆的右顶点
和上顶点
分别作与
轴和
轴的平行线交于
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于
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________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】2021年4月29日11时22分,天和号核心舱成功发射,标志着中国天宫空间站正式开建,如图(1)所示.返回舱是宇航员从太空返回地球的座舱,如图(2)所示,返回舱内空间越大宇航员越舒适.若返回舱的轴截面曲线是由半椭圆
和半圆弧
组成的“曲圆”,如图(3)所示,过半椭圆上焦点
作两条关于y轴对称的直线交上半椭圆于
,交下半圆弧于
,则梯形
面积的最大值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2f9142c91c88869746fcbeb03ed421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc5241174a94c21bcf0ca70f9e5a13a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52041559f8fee18bfa3e2e2ac07c3bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bba134b8dcecf5b81721abe3b34e1b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/446aa7fc-705d-4e23-a069-d1be5a2ee756.png?resizew=459)
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