How do you calculate log _3 (9)? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer Cesareo R. Jul 1, 2016 2 Explanation: log_3 9=log_3 3^2=2 cdot log_3 3 = 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 1691 views around the world You can reuse this answer Creative Commons License