JEE Advanced 2015 Mathematics question
Let and be two ellipses whose centers are at the origin. The major axes of and lie along the -axis and the -axis, respectively. Let be the circle . The straight line touches the curves , and at , and , respectively. Suppose that . If and are the eccentricities of and , respectively, then the correct expression(s) is(are)
Answer: (A),(B)
Solution
The foot of the perpendicular from the centre of to is . Points on the line at distance from : and . The line touches when , at the point
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