Jika 3 log 5 =p maka 27 log 45 =

'27 log 45 =

³ log 45/³ log 27 =

³ log (3² x 5) / ³ log 3³ =

(2.³ log 3 + ³ log 5) / 3.³ log 3 =

(2.1 + p) / (3.1) =

(p+2) / 3