1. The problem statement, all variables and given/known data Ʃ 4/(n(n+2)) from n=1 to n=infinity 2. Relevant equations 3. The attempt at a solution I tried using partial fractions to get A/n + B/(n+2), and I solved for A and B to get A=2 and B=-2 I tried summing them up, so everything would cancel except the first & last term, but nothing cancels. I'm not sure of any other methods for finding sums or if I'm not just using this one wrong. Any help?