Site: US and Canada

Change Of Base

Published on 01/24/2012

Activity Overview

Discover the change of base rule for logarithms by examining the ratio of two logarithmic functions with different bases.

Key Steps

  • Image

    In Problem 1, students use the program DIFFBASE to compare the graphs of two logarithmic functions with different bases.

  • Image

    In Problem 2, students investigate the value of c, a constant factor, as the values of the bases of the logarithmic functions change.

  • Image

    Students can then use the values of the bases and c stored in a table, to guess a formula for calculating c.

Version: 1.20130516.105409 rev. 47177 (Production)