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.
Use a definição de logaritmo para resolver: -8log_9 x = 16 . (Resp: x = 1/81 )
Use a definição de logaritmo para resolver: -8log_9 x = 16 . (Resp: x = 1/81 )
Natural Language
Math Input
