2015년 11월 3일 화요일

Logarithm law 4

log (x/y) = log (x) - log a (y)

The derivation of this law The derivation of this law is identical to the derivation of Logarithm Law 3 and is left as an exercise.

For example, show that log ( 10/1000 ) = log 10 − log 1000.

       log (10)
       log (1000)
       log (10 / 1000) = log (1 / 100)
                                = log (10^(-2))
                                = -2