Coba tolong isikan pertanyaan di atas

15. ²log 1/3 + ²log 6 + 5log 25 = ²log (1/3 x 6) + 5log 5²
=²log 2 + 5log 5²
= 1+2 = 3

16. ³log 2 x ²log 3 – ²log 1/16 = ³log 3 – ²log 2^-4
=1-(-4)
=5