The derivative of a function can be used to:

- find the
**Tangents**and**Normals**to a curve - determine whether a function is
**increasing**or**decreasing** - calculate the average rate of change of a function
- small changes
- Maxima and Minima

The derivative of a function can be used to:

- find the
**Tangents**and**Normals**to a curve - determine whether a function is
**increasing**or**decreasing** - calculate the average rate of change of a function
- small changes
- Maxima and Minima

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