How do you calculate #Log_7 15 #? Precalculus Properties of Logarithmic Functions Functions with Base b 1 Answer Shwetank Mauria Jun 14, 2016 #log_7 15=1.39167# Explanation: As #log_abxxlog_bc=log_ac# #log_bc=log_ac/log_ab# Hence #log_7 15=log15/log7=1.1761/0.8451=1.39167# Answer link Related questions What is the exponential form of #log_b 35=3#? What is the product rule of logarithms? What is the quotient rule of logarithms? What is the exponent rule of logarithms? What is #log_b 1#? What are some identity rules for logarithms? What is #log_b b^x#? What is the reciprocal of #log_b a#? What does a logarithmic function look like? How do I graph logarithmic functions on a TI-84? See all questions in Functions with Base b Impact of this question 1739 views around the world You can reuse this answer Creative Commons License