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Applying the Second Fundamental Theorem of Calculus to Find f(x)

This concept covers the Second Fundamental Theorem of Calculus (the derivative of an integral with a variable upper limit), which states that for a continuous function f, the derivative with respect to x of the integral from a constant to x of f(t) dt equals f(x). It is applied within single-variable calculus to recover an unknown continuous function f from a given expression for its accumulation function, by differentiating the accumulation function using standard differentiation rules (product rule, chain rule) and evaluating the result at a point. This situates the topic within the broader relationship between differentiation and integration as inverse operations.