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Applied Mathematics · Ch 1 — Numbers and Quantification

Laws and Properties of Logarithms

1.8

Laws and Properties of Logarithms

Logarithms are not arbitrary rules — they are a direct consequence of the way exponents work. Every law of logarithms mirrors a corresponding law of exponents, so understanding one gives you the other for free. Once you see that log⁡b(mn)=log⁡bm+log⁡bn\log_b(mn) = \log_b m + \log_b n is just another way of saying bp⋅bq=bp+qb^p \cdot b^q = b^{p+q}, the properties stop being a list to memorise and become a natural toolkit for simplifying expressions. This section builds that conn …