find the Sn of An = 1/2^n
Last edited by confusedgirl; Mar 2nd 2010 at 06:35 AM. Reason: i accidentally asked the same question
Follow Math Help Forum on Facebook and Google+
geometric sum for $\displaystyle a=\frac12$ where $\displaystyle \sum_{j=0}^na^j=\frac{a^{n+1}-1}{a-1}.$
View Tag Cloud