已知椭圆E的方程是x2a2+y2b2=1(a>b>0),其左顶点为(-2,0), 发布时间:2017-04-26 16:56 │ 来源:www.tikuol.com 题型:解答题 问题: 已知椭圆E的方程是x2a2+y2b2=1(a>b>0),其左顶点为(-2,0),离心率e=12.(1)求椭圆E的方程;(2)已知倾斜角为45°且过右焦点的直线l交椭圆E于A、B两点,若椭圆上存在一点P,使OP=λ(OA+OB),试求λ的值.
题型:解答题 While the development of the suburbs has created problems, it has also provided() modern housing for millions of people.A.excessiveB.immenseC.memorableD.substantia 查看答案