Learn how to rewrite any logarithmic expression in a different base. For example, rewrite log_2(3) as ln(3)/ln(2). This is very helpful for evaluating logarithms with a calculator, which only evaluates base-10 and base-e logarithms.
7872_Evaluating_logarithms_change_of_base_rule.html
All video content by Khan Academy is under their license: CC by NC SA
Website created using Khan Academy Static Downloader