Rumus Logaritma

1. alog (c x d) = alog c + alog d

contoh: 2log (8) = 2log (2 x 4) = 2log 2 + 2log 4 = 1 + 2 = 3

2. alog (c : d) = alog c - alog d

contoh: 3log (9) = 3log (27 : 3) = 3log 27 - 3log 3 = 3 - 1 = 2

3. alog cd = d x (alog c)

contoh: 2log 28 = 8 x (2log 2) = 8 x 1 = 8

4. (alog b)(blog c) = alog c

contoh: (2log 65)(65log 8 ) = 2log 8 = 3

5. (alog b) : (alog c) = clog b

contoh: (7log 64) : (7log 2) = 2log 64 = 6