已知椭圆
的左、右焦点为
,
,点P为椭圆上动点,则
的值是______ ;
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.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/762d2c5304d4b9a6867a359dbecb0956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810785c32b9c154d9fea54a37e609b3a.png)
21-22高二·全国·期中 查看更多[4]
更新时间:2022-04-24 09:01:55
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【推荐1】已知椭圆
的左、右焦点分别为
,点
在该椭圆上,若
,则
的面积是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
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【推荐2】设
,
分别为椭圆
与双曲线
的公共焦点,
与
在第一象限内交于点M,
.若椭圆
的离心率
,则双曲线
的离心率
为______ .
![](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/ff8210484dd6815b5bebc7b22f1389cd.png)
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【推荐1】若点
为椭圆
上的一点,
,
为左右焦点,若
,则点
到
轴的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】已知椭圆
的左右焦点分别为
、
,点
在椭圆上,若线段
的中点在
轴上,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d5bc72cd0ccba883f9214e6d2533873.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c83dc94d97a362557f847c4fb002771.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb4717d7fa6d522090c5e949f650bd8.png)
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