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 1 / (1 + exp (-x - x^3/12 -x^5/80 -x^7/448)) for x=-4..4
plot 1 / (1 + exp (-x - x^3/12 -x^5/80 -x^7/448)) for x=-4..4
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random