Tolong dgn caranya yang mudah dipahami ya……. thanks

Log 6, log 12, log 24, ….
beda = b = log 12 – log 6 = log 12/6 = log 2

U8 = a + (8-1)b = log 6 + 7 log 2 = log 6 + log 2^7 = log 6 + log 128
= log 6 x 128 = log 768