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 y = 1 e^(- 0.5x ) - 2 e^(-x) + 0.5 e^(-3x) from x = 0 to x = 20
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random