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Log Power Rule


The log power rule is the logarithm identity

 log_b(x^a)=alog_bx,

where b>0, b!=1, and x>0 are real numbers, and a is a real number. On the principal branch of the complex logarithm, the identity can require an additive integer multiple of 2pii.


See also

Logarithm, Logarithm Laws, Power

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References

Abramowitz, M. and Stegun, I. A. (Eds.). "Logarithmic Function." §4.1 in Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing. New York: Dover, pp. 67-69, 1972.

Cite this as:

Weisstein, Eric W. "Log Power Rule." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/LogPowerRule.html

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