What is log_5 125? Precalculus Properties of Logarithmic Functions Logarithm-- Inverse of an Exponential Function 1 Answer seph Oct 25, 2014 log_a b = x => a^x = b log_5 125 = x => 5^x = 125 => 5^x = 5^3 => x = 3 => log_5 125 = 3 Answer link Related questions What is a logarithm? What are common mistakes students make with logarithms? How can a logarithmic equation be solved by graphing? How can I calculate a logarithm without a calculator? How can logarithms be used to solve exponential equations? How do logarithmic functions work? What is the logarithm of a negative number? What is the logarithm of zero? How do I find the logarithm log_(1/4) 1/64? How do I find the logarithm log_(2/3)(8/27)? See all questions in Logarithm-- Inverse of an Exponential Function Impact of this question 7351 views around the world You can reuse this answer Creative Commons License