Jawabanmu

2014-09-09T21:23:54+07:00
A) log 18 = log 2 + log 3 + log 3 = 0,301 + 2(0,477) = 1,255

b) log 21 = log 3 + log 7 = 0,477 +0,845 = 1,322

c) log 10,5 = log 3 + log 7 / 2 = 0,477 + 1/2(0,845) = 0,422

d) log 1/7 = log 7^-1 = -1 (0,845) = - 0,845
tolong di cek dulu jawabanya
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