Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! 🙂 https://www.patreon.com/patrickjmt !! Finding the Sum of a Series by Differentiating. Ok, I think this is sort of a ‘tricky’ problem! Here we find the sum of a series by differentiating a known power series to get to original series into a more recognizable form.