Saturday, January 5, 2008
Factorials are represented with an “!” symbol. They tell you to multiply the number before the ! by every positive integer before it. For instance,
5! = 5*4*3*2*1 = 120
In general, for any positive integer n, we have
n! = n*(n - 1)*(n - 2)*...*3*2*1
Notation - Factorials
