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Kelas X
³log12-3.³log2+³log9-³log1/2
=> ³log12 - ³log2³ + ³log9 - ³log1/2
=> ³log(12.9 / 8.1/2)
=> ³log27
=> 3
Sifat logaritma
^alogb + ^alogc = ^alog(b.c)
^alogb - ^alogc = ^alog(b/c)