Question

Jika 5 log 3 = p, maka 15 log 81 adalah

Answer 1

5log3= p

15log81
= log81 / log15
= 3log81 / 3log15
= 3log3^4 / 3log(3×5)
= (4× 3log3) / (3log3 + 3log5)
= 4 / (1 + 1/p)
= 4 / (p+1 / p)
= 4 × (p / p+1)
= 4p / p+1

Maaf klo salah, trims :)