### Session Overview

This session establishes some notation and terminology for the course. We review the exponential function, which will play an essential role for us. Finally, we define what we mean by a differential equation and what it means to solve one. |

### Session Activities

Read the course notes:

- The Exponential Function (PDF)
- Variables and Parameters (PDF)
- Notations for Derivatives (PDF)
- Differential Equations (PDF)

### Check Yourself

Take the quiz: