# Mathematical Background

Check your understanding of some mathematical notations and tools.

## We'll cover the following

In this lesson, we review some mathematical notations and tools used throughout this course, including logarithms, big-Oh notation, and probability theory. This review will be brief and is not intended as an introduction.

## Exponentials and logarithms

The expression $b^x$ denotes the number $b$ raised to the power of $x$.

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