试题与答案

已知椭圆C的焦点在x轴上,中心在原点,离心率e=33,直线l:y=x+2与以原点

题型:解答题

题目:

已知椭圆C的焦点在x轴上,中心在原点,离心率e=
3
3
,直线l:y=x+2与以原点为圆心,椭圆C的短半轴为半径的圆O相切.
(I)求椭圆C的方程;
(Ⅱ)设椭圆C的左、右顶点分别为A1,A2,点M是椭圆上异于Al,A2的任意一点,设直线MA1,MA2的斜率分别为kMA1kMA2,证明kMA1kMA2为定值.

答案:

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参考答案:E

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