How do you write 225^(-1/2)=1/15 in Log form? Precalculus Properties of Logarithmic Functions Logarithm-- Inverse of an Exponential Function 1 Answer Shwetank Mauria Sep 19, 2016 225^(-1/2)=1/15 is written as log_225 (1/15)=-1/2 in log form. Explanation: a^m=b is written as log_a b=m in log form. Hence 225^(-1/2)=1/15 is written as log_225 (1/15)=-1/2 in log form. 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 2107 views around the world You can reuse this answer Creative Commons License