How do you simplify #log _(1/2) (9/4)#? Precalculus Properties of Logarithmic Functions Common Logs 1 Answer Alan N. Sep 25, 2016 #-(ln9-ln4)/ln2~=-1.16992# Explanation: Remember: #log_a x = log_b x/log_b a# Let #a=1/2, x=9/4 and b=e# #:. log_"1/2"(9/4) =ln(9/4)/ln(1/2)# #= (ln9-ln4)/(ln1-ln2)# #=(ln9-ln4)/(0-ln2) = - (ln9-ln4)/ln2# #~= -1.16992# 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 1280 views around the world You can reuse this answer Creative Commons License