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contoh: 2log 4+2log 8 = 2log 4.8 = 2log 32 = 5
2. alog x - alog y = alog (x/y)
contoh : 2log 16 - 2log 8 = 2log (16/8) = 2log 2 = 1
3. alog xpangkat n = n alog x
contoh : 2log 3 + 4log 3 = log 3 pangkat 2 + log 3 pangkat 4
= log 9 + log 81 = log 729
4. alog b . blog c = alog c
contoh : 3log 7 . 7 log 81 = 3log 81
5. a pangkat alog x = x
contoh : 5 pangkat 5log 8 = 8
6. a pangkat nlog b pangkat m = (n/m) alog b
contoh : 4log 32 = 2 pangkat 2log 2 pangkat 5 = 2 . 5