Diketahui ³log4=p dan ³log5=q nilai dari ³log1200

³log4 = p
³log5 = q

³log1.200
= ³log(3 x 16 x 25)
= ³log3 + ³log16 + ³log25
= ³log3 + ³log4² + ³log5²
= ³log3 + (2 x ³log4) + (2 x ³log5)
= 1 + 2p + 2q
= 2p + 2q + 1