经过椭圆
的右顶点与上顶点的直线斜率为
,则
的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b0dadb875cccce870b69409a476606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b9df9f9821a3c9c9335b13e3344b38e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
更新时间:2024-04-24 12:09:25
|
相似题推荐
填空题-单空题
|
适中
(0.65)
【推荐1】已知
是相异的两点,则直线
的倾斜角的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b2c04073ec3147af3844ef805a752f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐2】已知抛物线
与圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a02f99663f5d84c1d66b48b604e63e6.png)
有公共点
,若抛物线在
点处的切线与圆
也相切,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e40e3883271c3580c1d3c805dcac6.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a02f99663f5d84c1d66b48b604e63e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc3093ad99506dcc74dfd053a6b87134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/258e40e3883271c3580c1d3c805dcac6.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐1】已知椭圆E的两个焦点分别为F1,F2,点P为椭圆上一点,且
,tan∠PF2F1=-3,则椭圆E的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8fe5b227b71e882ba351963360650b2.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
【推荐2】已知椭圆
过点
,其短轴长的取值范围是
,则椭圆离心率的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dce10bf671cc2ebc67aa7fd568a9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38620d68461307e424923b903ab518f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8eec1c8d1c199819cc936161dc4a91.png)
您最近一年使用:0次