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a) log 72= log(3x3x3)
= log 3 + log 3 + log 3
= 0.4771 + 0.4771 +0.4771 = 1,4313
b) lo 40,5 = log (3x3x3x3:2)
= log 3 + log 3 +log 3 + log 3 - log 2
= 0.4771 + 0.4771 +0.4771 +0.4771 - 0,3010
= 1,1303
ini jawaban nya maaf kalau salah