(a^n)-1 [Archive] - Physics Forums

View Full Version : (a^n)-1

crazyformath2

Mar25-09, 07:59 AM

Can someone help me.
How would I expand (a^n)-1 and is there a theorem for this?

an-1

tiny-tim

Mar25-09, 10:30 AM

Hi crazyformath2! :smile:

an - 1 = (a - 1)(an-1 + an-2 + … + 1) :wink: