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/Log(2,1+x),72/(x*100)) for x from 0.01 to 0.9
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random