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 1/2^n, n=1 to log(2,P)
sum 1/2^n, n=1 to log(2,P)
Natural Language
Math Input
Extended Keyboard
