Calculus in 20 Minutes Part 1. Highlights of Calculus (5 videos) Free Online Course Materials. Free Online Course Materials. The Calculus Lifesaver. A Calculus Analogy: Integrals as Multiplication. Integrals are often described as finding the “area under the curve”.
This description is misleading, like saying multiplication is for finding “the area of a rectangle”. Finding area is a useful application, but not the purpose. Integrals help us combine numbers when multiplication can’t. Dismantling the calculus pyramid.