香港科技大学“逸夫演艺中心”鸟瞰图如图1所示,最上面两层类似于离心率相同的两个椭圆,我们把离心率相同的两个椭圆叫做“相似椭圆”.如图2所示,在“相似椭圆”
,
中,由外层椭圆
的下顶点
和右顶点
分别向内层椭圆
引切线
,
,且两切线斜率之积等于
,则该组“相似椭圆”的离心率为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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更新时间:2023-02-11 23:43:50
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【推荐1】设
是椭圆
的左、右焦点,点
为椭圆
上的两点,且满足
,则椭圆
的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7638c88f01d609d79947033ed4ff36a2.png)
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【推荐2】已知椭圆
的左、右焦点分别为
,若以
为圆心,b-c为半径作圆
,过椭圆上一点P作此圆的切线.切点为T,且|PT|的最小值为
,则椭圆的离心率e的取值范围是____________ .
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【推荐1】直线
与椭圆
相交于
两点,
与
轴、
轴分别相交于
两点.如果
是线段
的两个三等分点,则直线
的斜率为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】在平面直角坐标系
中,点
的坐标为
,且
,动点
与
,
连线的斜率之积为
,则动点
的轨迹方程为______ ,
的面积的取值范围是______ .
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