The foci of the ellipse 4x^2+9y^2=1 are at Q and R. If P(x, y) is any point on the ellipse, then what is PQ+PR equal to?

NDA 2024 Mathematics question

The foci of the ellipse are at and . If is any point on the ellipse, then what is equal to?

Answer: (B)

Write the ellipse as , so , i.e. (semi-major

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

Question ID VK-029948