Home » Courses » Mathematics » Single Variable Calculus » 3. The Definite Integral and its Applications » Part A: Definition of the Definite Integral and First Fundamental » Session 43: Definite Integrals

We can use antiderivatives to find the area bounded by some vertical line x=a, the graph of a function, the line x=b, and the x-axis. We can prove that this works by dividing that area up into infinitesimally thin rectangles.
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Integration Intuition
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