I used a double integral to solve a single improper integral

I know we haven't done a hard integral for a while now, so let's integrate ((1-e^(-t))/t)^2 from 0 to infinity. I didn't use Feynman's technique of integration for this since the denominator is t^2, but I used a double integral to solve this one! Surprised? Watch the video to find out my solution! ---------------------------------------- Big thanks to my Patrons for the full-marathon support! Ben D, Grant S, Mark M, Phillippe S. Michael Z, Jan P. Devun C. Stefan C. Ethan BW Didion S. NN Minkyu Y Brandon F 💪 Support this channel and get my math notes by becoming a patron: https://www.patreon.com/blackpenredpen 🛍 Shop my math t-shirt & hoodies: https://amzn.to/3qBeuw6 ---------------------------------------- #blackpenredpen #math #calculus #apcalculus