plot abs( 1 + ((1-ix)*(1-ix*2)*(1-ix*3)(1-ix*4))/((1+ix)*(1+ix*2)*(1+ix*3)*(1+ix*4) )) from 0 to 5

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.