The function f is defined for all the positive integers s by the following rule: f(s) is the number of positive integers each of which is less than s and has no positive factor in common with s other than 1 . if p is a prime number then f(p)?
Select:	A) p-1	B) p-2	C) (p+1)/2	D) (p-1)/2	E) 2
The moment you put a prime number in the function f(s), notice that all the numbers lesser than s have no divisor clashing with divisor of s since s is prime!!.   For instance f(7)= {6, 5, 4, 3, 2, 1}   Thus for f(p) number of integers falling under this set will be p-1   p-1nswer :- p-1
<result>A</result>
The function f is defined for all the positive integers s by the following rule: f(s) is the number of positive integers each of which is less than s and has no positive factor in common with s other than 1 . if p is a prime number then f(p)?