Sal approximates log₅(100) by rewriting it as log(100)/log(5) using the change of base rule, then evaluates with a calculator.

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2017年5月3日 · There is a change of base formula for converting between different bases. To find the log base a, where a is presumably some number other than 10 or e, otherwise you would just use the calculator, Take the log of the argument divided by the log of the base.

Proof of the change of base formula for logarithms.

2024年9月19日 · Logarithms: For base 10, enter "log(x)". For natural logarithms, enter "ln(x)" For natural logarithms, enter "ln(x)" Logarithms with other bases: Enter as "log_b(n)", where b is the base and n is the number

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