设
分别是椭圆
的左、右焦点,O为坐标原点,点
在
上.且
则
的面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5023d88e11dce13bd4a64de92165bcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5a5d18466e9161acac7fbf0eead015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
更新时间:2021-02-14 20:49:30
|
【知识点】 椭圆中焦点三角形的面积问题
相似题推荐
填空题-单空题
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较易
(0.85)
名校
解题方法
【推荐1】已知椭圆
的左焦点为
,
,
是椭圆上关于原点对称的两点,若
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9ca9ea5c24e205bf7e26d1f5aa49fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adccd1dd14171c8c29d4a3836728c0f.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐2】在平面直角坐标系
中,
是椭圆
上任意一点,
椭圆的两个焦点,
的面积为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b3a4a566ee5e259fec5b084635ff25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d26fb96629d7a6ffa5d71862880d8f.png)
您最近一年使用:0次