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5.1 Definition

Think of logarithms as exponents going backward (inverses).

To what power do I have to raise a to get to y.

In other words

\begin{displaymath}\fbox{$a^{??} = y.$ }\end{displaymath}

The question marks are defined as the logarithm of y base a.

A typical log relationship.


next up previous
Next: 5.2 Up: 5. Previous: 5.
Richard Waterman
1999-05-06