题目内容

(本题满分15分)

在平面直角坐标系xOy中,已知对于任意实数,直线恒过定点F. 设椭圆C的中心在原点,一个焦点为F,且椭圆C上的点到F的最大距离为.

(1)求椭圆C的方程;

(2)设(mn)是椭圆C上的任意一点,圆O与椭圆C有4个相异公共点,试分别判断圆O与直线l1mx+ny=1和l2mx+ny=4的位置关系.

 

【答案】

(1)

(2)直线l1与圆O相交,直线l2与圆O相离

【解析】略

 

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