已知椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506017_ST/0.png)
(a>b>0)的上顶点坐标为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506017_ST/1.png)
,离心率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506017_ST/2.png)
.(Ⅰ)求椭圆C的方程;(Ⅱ)设P为椭圆上一点,A为椭圆左顶点,F为椭圆右焦点,求
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506017_ST/3.png)
的取值范围.
考点分析:
相关试题推荐
设a、b、c分别是△ABC三个内角∠A、∠B、∠C的对边,若向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506016_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506016_ST/1.png)
且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506016_ST/2.png)
,
(1)求tanA•tanB的值;
(2)求
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506016_ST/3.png)
的最大值.
查看答案
设O为△ABC的内心,当AB=AC=5,BC=6时,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506015_ST/0.png)
,则m+n的值为
.
查看答案
已知曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100050853850698/SYS201311031000508538506014_ST/0.png)
的切线l过点A(2,4),则切线l的斜率为
.
查看答案
若⊙O
1:x
2+y
2=5与⊙O
2:(x-m)
2+y
2=20(m∈R)相交于A、B两点,且两圆在点A处的切线互相垂直,则线段AB的长度是
查看答案
在△ABC中,已知BC=8,AC=5,三角形面积为12,则cos2C=
.
查看答案