Properties

Change of Base Property

The Change of Base Property allows you to solve logs with a calculator when you cannot use mental math or conversion to exponential form. Since most scientific calculators only calculate common log and natural log , there will be times when it is necessary to change bases in order to calculate a log function.

The Change of Base Property states:

This is not a property that needs to be memorized; it can be found using the properties you have already learned as shown in the following example.