# Using laws of log. How come 1/4 log3 81 equal 1?

• Using laws of log. How come 1/4 log3 81 equal 1?

(81) = log3 (3 4). Now we use that ... 1 8) 2 2 = 1 4 2=log2 (1 4) 2 1 = 1 2 1=log2 (1 2) 20 =1 0=log 2 (1) ... logarithms. The second equal sign uses that ...
Positive: 60 %
The laws of logarithms, ... Where Did Logs Come From? ... Therefore log 125 5 = 1/3 and log 5 125 = 3, and 1/3 does indeed equal 1/3.
Positive: 57 %

### More resources

How to Solve Logarithmic Equations. ... equation 3 –4 = x, or 1/81 = x. ... combine the two logs that are adding into one log by using the ...
Positive: 60 %
Deriving Approximate Logarithms. ... We thus have the logarithm of a number between 1 and 10, which turns to equal ... To get log 3.73 we add to log3 ...
Positive: 55 %
1 4 1 4 4 4 x=6 x=6 x =1296 ... 5xlog6=(2x -1)log3 5xlog6=2xlog3-log3 ... Part V – Solving Using Log Rules solving using log rules: ...
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