Question 1: What are the two most important bases for logarithms? What is the base for Log and what is the base for Ln buttons on your calculator? Question 2: How can we use the change of base theorem to find the logarithm for any base using our calculators? We solved exponential and logarithmic equations in the last module by setting both sides of an exonential equation to have the same base. We learned that if the bases are equal, then the powers were equal. If a" = ay, then x = y. Since logaritmic equations can be written in exponential form, we used this technique on both types of equations. Not all bases are equal when solving logarithmic and exponential equations