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Calculus, developed in the late 1600s, tackles two fundamental questions about functions: how steep a function is at a single point and what the area is beneath its graph over a region []. The "steepness" at a point is determined by the derivative, which is found by taking a sequence of secant lines through nearby points and observing the limit of their slopes as the points converge, effectively finding the slope of the tangent line []. Conversely, the integral addresses the area under a curve by approximating it with a series of thin rectangles, and observing the limit of their combined areas as the rectangles become infinitely thin [].
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Calculus, developed in the late 1600s, tackles two fundamental questions about functions: how steep a function is at a single point and what the area is beneath its graph over a region []. The "steepness" at a point is determined by the derivative, which is found by taking a sequence of secant lines through nearby points and observing the limit of their slopes as the points converge, effectively finding the slope of the tangent line []. Conversely, the integral addresses the area under a curve by approximating it with a series of thin rectangles, and observing the limit of their combined areas as the rectangles become infinitely thin [].