1.1: Definition of the Integral - Mathematics LibreTexts
https://math.libretexts.org/Bookshelves/Calculus/CLP-2_Integral_Calculus_(Feldman_Rechnitzer_and_Yeager)/01%3A_Integration/1.01%3A_Definition_of_the_Integral
Web ResultMay 28, 2023 · Joel Feldman, Andrew Rechnitzer and Elyse Yeager. University of British Columbia. Arguably the easiest way to introduce integration is by considering the area between the graph of a given function and the x -axis, between two specific vertical lines — such as is shown in the figure above.
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