设
是椭圆
的离心率,若
,则
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e5bc4f373f1390d415bc52de31b42b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0202deb8c9253ad53a76fcce5158005a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
21-22高二上·广东佛山·阶段练习 查看更多[2]
更新时间:2022-03-09 16:55:14
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【知识点】 由椭圆的离心率求参数的取值范围
相似题推荐
填空题-双空题
|
适中
(0.65)
解题方法
【推荐1】(1)已知焦点在x轴上的椭圆
的离心率为
,则k的值为___________ .
(2)设
,
是椭圆
的两个焦点,
为直线
上一点,
是底角为
的等腰三角形,则
的离心率为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0928f5a86f4be2027b7dd7188f1691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(2)设
![](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/502d0666198bd9209f07e8aef74f92e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fbc50ec48235951fd155d664681cec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996bf3d35b6763cbc1a423b13a9df2dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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填空题-单空题
|
适中
(0.65)
【推荐2】已知椭圆G:
(
)的左、右焦点分别
,
,离心率
,点M是椭圆G上任意一点,则
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.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/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055d142537abd9027651859f62661fa4.png)
您最近一年使用:0次