Our study of ``nice'' functions $f$ in this chapter has so far focused on individual points: points where $f$ is maximal/minimal, points where $\fp(x) = 0$ or $\fp ...

Below is the graph of a quadratic function, showing where the function is increasing and decreasing. If we draw in the tangents to the curve, you will notice that if the gradient of the tangent is ...

A line drawing of the Internet Archive headquarters building façade. An illustration of a magnifying glass. An illustration of a magnifying glass.