This algebra lesson shows how to use logarithm rules to break up complicated logarithms into several simple logs. We cant do anything with logax21. By taking the log of an exponential we can then move the variable being in the exponent thats now inside a log out in front as a multiplier on the log.
Use the definition of logarithm.
Keep the answer exact or give decimal approximations. In this section well take a look at solving equations with exponential functions or logarithms in them. This algebra video tutorial explains how to solve exponential equations using basic properties of logarithms. If none of the terms in the equation has base 10 use the natural logarithm.