Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
sum_(n=0)^∞ (binomial(3 n, n) ϵ^n)/(2 n + 1)
sum_(n=0)^∞ (binomial(3 n, n) ϵ^n)/(2 n + 1)
Natural Language
Math Input
Extended Keyboard