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JEE Main 2025 Mathematics question

MathematicsEllipseJEE Main 2025

Let p be the number of all triangles that can be formed by joining the vertices of a regular polygon P of n sides and q be the number of all quadrilaterals that can be formed by joining the vertices of P. If p + q = 126, then the eccentricity of the ellipse is :

Answer: (2)

Solution

Solving , , p+q=126 gives n=8. Ellipse:

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Question ID VK-003024