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.
FullSimplify[2 - (p^((k+1)/2))((p^((k+1)/2) - 1)/(p - 1))((2(p-1))/(p^(k+1) - 1))]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random