Diketahui log 2 = a, log 3 = b, maka log 360.....

log(360) = log(2 x 2 x 3 x 3 x 10)
log(360) = log(2) + log(2) + log(3) + log(3) + log(10)
log(360) = a + a + b + b + 1
log(360) = 2a + 2b + 1