In this video, we provide essential "math help" by demonstrating how to "graph a function" that is defined piecewise. This ...

Here's the modified description with all links and related text removed: Learn how to graph piecewise functions. A piecewise function is a function which has more than one sub-function for different ...

Of course this produces the same derivative values as the usual limit-based definitions of the derivative. What makes this possibly preferable to the usual formulas, though, is that it arises out of ...