20 Feb 2006, 17:51 Avis wrote:The function f is defined for all positive integers n by the following rule:f(n) is the number of positive integers each of which is less than n and has no positive factor in common with n other than 1. if P is any prime number then f(p) = a) 2b) p/2 - 1/2c) - (2-p)d) -(1-p)e) p/2 + 1/2