Question

Jika 3log 5 = p, dan 5log 4 = q, maka 4log 15 = …

Answer 1

4log 45 = 4log 5.9
= 4log 5 + 4log 9
= 1/q + 4log 3^2
=1/q + 2.(4log 3)
=1/q + 2.(5log 3/ 5log 4)
=1/q + 2.(1/p  / q)
=1/q + 2/pq
= (p+2)/pq