Jika 5log 125=b, maka b log 27=

5'log 125 = b
5'log 5^3 = b
3 . 5'log 5 = b
3 . 1 = b
b = 3

b'log 27 = 3'log 3^3 = 3 . 3'log 3 = 3 × 1 = 3

Materi : Ekponen dan Logaritma