Powers {logarithm, exponential} of bases make numbers. For number e^2, ln(e^2) = 2. For number 100, log(100) = log(10^2) = 2. Taking logarithms and finding exponentials are inverses.
Logarithms {Naperian logarithm} can use base 10. For example, log(100) = 2, because 10^2 = 100.
Logarithms {natural logarithm, exponential}| {hyperbolic logarithm} can use base e. For example, ln(e^2) = 2.
Numbers can multiply logarithms with one base to give logarithms with another base {modulus, logarithm}.
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Date Modified: 2022.0225