Khan Academy Static

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.

2476_Proof_of_the_logarithm_change_of_base_rule.html

2474_Evaluating_logarithms_change_of_base_rule.html

2475_Using_the_logarithm_change_of_base_rule.html