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Introduction to integral calculus | Accumulation and Riemann sums | AP Calculus AB | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/ap-calculus-ab/ab-integration-new/ab-6-1/v/introduction-to-integral-calculus The basic idea of Integral calculus is finding the area under a curve. To find it exactly, we can divide the area into infinite rectangles ...
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