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.
log[10, 2^x + 4^x]-log[10, 8] = log[10, 2^(x-1) - 1/4]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
