Log math question....???? help?
Evaluate:
log3 1/81
It says log with a 3 below ......with 1 over 81
Evaluate:
log3 1/81
It says log with a 3 below ......with 1 over 81
Amanda
Favorite Answer
all this is asking is:
3 to the power of a number is equal to 1/81.
to solve this on your calculator, all you do is log1/81 divided by log 3
this gives you -4.
therefore 3^-4 is 1/81!
Maggie C
The log is asking "3 to what power is 1/81?"
3^4 = 81 and we use a negative exponent to invert, so the answer is -4 instead of 4.
Como
Let log represent log to base 3.
log (1 / 81) = log (1 / 3^4) = log (3^(-4)) = - 4 log 3 = - 4
Jenova
It's -4.
Let me show you why:
1/81 is the same thing as 1 / (3^4) right?
Now we just get rid of the fraction bar by making the power negative. So 1 / (3^4) is now 3^-4
There you go, the answer is -4
Anonymous
243/81