1. The problem statement, all variables and given/known data Represent 5x / (10 + x) as a power series, find c0, c1, c2, c3 and c4, find the radius of convergence 3. The attempt at a solution I think I got the representation fine: Ʃ from 0 to ∞ = 1/2 [ (-1^n)(x^n+1) / 10^n ] Radius of Conv. = 10 But what the hell are those c0, c1 etc...? I thought they were the coefficients of the series but I keep getting them wrong... My answers are: c0 = 1/2 , c1 = -1/20, c2 = 1/200 ..... Any help please?