How to solve 2^-log5(base 2) without a calculator? Thanks.
I assume you have this :
2^(-log2 5) if so.....we can write this as
2^(log2 5-1) =
2^[log2 (1/5) ] =
1/5
This goes back to the property that says that ... b^(logb a) = a where b is a positive base
Go for it CP, logs are not my thing.
How did you get \({5}^{-1}\)?
Look at this, gibson338...
-log2 5 = (-1) log2 5 and by a property of logs, we have
a log b = log ba ...... so......
(-1)log2 5 becomes log2 5-1 and 5-1 = 1/5
So we end up with 2^ [log2 1/5]
I get you now. I did not see the "-" in front of the log.