MathDB
System

Source: AIME 2008II Problem 14

April 3, 2008
trigonometrycalculusderivativegeometrycircumcirclefunctionconics

Problem Statement

Let a a and b b be positive real numbers with ab a\ge b. Let ρ \rho be the maximum possible value of ab \frac{a}{b} for which the system of equations a^2\plus{}y^2\equal{}b^2\plus{}x^2\equal{}(a\minus{}x)^2\plus{}(b\minus{}y)^2has a solution in (x,y) (x,y) satisfying 0x<a 0\le x<a and 0y<b 0\le y<b. Then ρ2 \rho^2 can be expressed as a fraction mn \frac{m}{n}, where m m and n n are relatively prime positive integers. Find m\plus{}n.