1. The problem statement, all variables and given/known data Suppose I have the power series: f(x) = A0 + A1 x +A2 x^2 ......An x^n Where A0..An are numbers, there is no recursion relation. Find the interval of convergence 2. Relevant equations 3. The attempt at a solution Can I use ratio test? How would I do this since there is no recursion relation for the A's? Can I do this numerically?