IMO 2019 Shortlist N8
Let a and b be two positive integers. Prove that the integer a2 R 4a2 b V is not a square. (Here rzs denotes the least i...
Category: Number Theory
Problem
Let a and b be two positive integers. Prove that the integer a2 ` R 4a2 b V is not a square. (Here rzs denotes the least integer greater than or equal to z.) (Russia) 10 Bath — UK, 11th–22nd July 2019