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)^(∞) ceil((n+1)/2)*x^n where x=1/3
sum_(n=0)^(∞) ceil((n+1)/2)*x^n where x=1/3
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random