tolong dong kakak2 senior :)

LogAritMa

(3'log 25 . 5'log 81 + 4'log 2) / (3'log 36 - 3'log 4)
= (3'log 5² . 5'log 3⁴ + 1/2 . 2'log 2) / (3'log 36/4)
= (2 × 4 + 1/2) / (3'log 3²)
= (8 1/2)/2
= 17/2 . 1/2
= 17/4 ✔

No 5 soalnya kurang jelas...
semoga membantu...
dari thomas h...