tiny-tim Science Advisor Homework Helper Messages 25,837 Reaction score 258 Apr 1, 2011 #31 (just got up :zzz: …) Bazzinga, you need to learn these two formulas … for all n:1 - xn = (1 - x)(1 + x + x2 + … + xn-1) for odd n:1 + xn = (1 + x)(1 - x + x2 - … + xn-1)
(just got up :zzz: …) Bazzinga, you need to learn these two formulas … for all n:1 - xn = (1 - x)(1 + x + x2 + … + xn-1) for odd n:1 + xn = (1 + x)(1 - x + x2 - … + xn-1)
