JEE Advanced 2015 Mathematics question

MathematicsEllipseJEE Advanced 2015

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

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-026474