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Propietats dels logaritmes

loga x + loga x = loga x·y

loga x - loga x = loga x/y

y loga x = loga xy

loga a = 1,  loga a2 = 2, loga a3 = 3...

loga 1 = 0

bold log subscript bold a bold x bold equals bold lnx over bold lna
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