GRE like question
Posted: Sat Aug 11, 2018 12:16 am
One of my students got me with this question. I thought of posting it here because it was interesting (once I could figure it out!)
Calculate sum [0 to oo] (-1)^x / [3^(2n+1) * (2n+1)!]
Calculate sum [0 to oo] (-1)^x / [3^(2n+1) * (2n+1)!]