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.
plot 2 x ( (1 - b)/(1 + (a x)^2)^2 + b /(1 + Abs[a x])) with a = 7.5 and b = 0.25
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random