<p>It’s probably not going to help you, but it’s basically using a differential equation to produce tangent lines that approximate the value of a function a certain distance away from a known point…</p>
<p>~But being able to figure things like this out on your own without seeing beforehand the steps to the actual process is a valuable skill to have in Calculus and the exam–rather than memorizing the process, understanding and being able to produce it :D</p>