Since the two logarithmic expressions on the left side of the equation have the same base you can use the quotient rule to re-express them as the following. Evaluate basic logarithmic expressions by using the fact that axb is equivalent to log_abx. So 4 log 3 81 is the same as 81 3 4.
Adding and Subtracting up to 10.
Adding and Subtracting up to 10. The logarithmic function x log by is the same as y b x in exponential form. Log1 5 1 625 4 log 1 5 1 625 4 Solution. Numbers up to 20.