5log3=p maka 15log81= ??

Kelas 10 Matematika
Bab Logaritma

^ = pangkat

^5log 3 = p

^15log 81
= (^3log 81)/(^3log 15)
= (^3log 3^4)/(^3log (3 . 5))
= (4 . ^3log 3)/(^3log 3 + ^3log 5)
= 4/(1 + 1/p)
= 4/((p + 1)/p)
= 4p/(p + 1)