Diketahui 5log 3 = a dan 3 log 4 = b. Nilai 4log 15=…

LogAritMa

5'log 3 = a
3'log 4 = b

4'log 15
= 3'log (3 × 5) / 3'log 4
= (3'log 3 + 3'log 5) / b
= (1 + 1/a) / b
= (a + 1)/(ab)

Logaritma

4 log 15
= 3 log 15 / 3 log 4
= 3 log (3 x 5) / b
= (3 log 3 + 3 log 5) / b
= (1 + 1/a) / b
= 1/b + 1/ab