3log25 × 5log81 - 4log2 __________________ 3log36 - 3log4

Kelas 10 Matematika
Bab Logaritma

(³log 25 . ⁵log 81 - ⁴log 2)/(³log 36 - ³log 4)
= (³log 81 . ⁵log 25 - ⁴log 4^(1/2)) / (³log (36/4))
= (³log 3⁴ . ⁵log 5² - 1/2 . ⁴log 4) / (³log 3²)
= (4 . 2 - 1/2) / 2
= (16 - 1)/4
= 15/4