SME
Grade 11 Math · Problem type
Which log rule?
Use this for “Expand log₅(25/y)” or “Is log(x + y) = log x + log y true?”
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Which rule makes the equation true?
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Assumptions
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A log turns multiplying into adding, dividing into subtracting and a power into multiplying.
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The rules come from the exponent rules, since a log is an exponent.
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A sum inside a log does not split, and (log x)², a power of a log, is not the power rule.
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Common logs from scientific notation
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Exponential and logarithmic equations, e and continuous growth
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