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.
x%2F(-3x %2B sum from n%3D0 to n%3Dinfinity of (x)%5E((n(n%2B1))%2F2))
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
