How do you calculate #log _3 (1/9)#? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer Cesareo R. Jun 17, 2016 #-2# Explanation: #log_3 (1/9)=log_3(1/3^2) = log_3^{-2} = -2# Answer link Related questions What is the common logarithm of 10? How do I find the common logarithm of a number? What is a common logarithm or common log? What are common mistakes students make with common log? How do I find the common logarithm of 589,000? How do I find the number whose common logarithm is 2.6025? What is the common logarithm of 54.29? What is the value of the common logarithm log 10,000? What is #log_10 10#? How do I work in #log_10# in Excel? See all questions in Common Logs Impact of this question 2158 views around the world You can reuse this answer Creative Commons License