A function ƒ(x) satisfies ƒ(1) = 3600 and ƒ(1) + ƒ(2) + … + ƒ(n) = n2 f(n), for all positive integers n >…

Let f(x) be a function satisfying  f(x)f(y) = f(xy) for all real x, y. If f(2) = 4, then what is the value of?

Suppose one wishes to find distinct positive integers x, y such that (x + y)/ xy is also a positive integer. Identify the  correct…