An integral is a mathematical concept used to calculate areas, volumes, and accumulated quantities by finding antiderivatives or sums of infinitesimal values.
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Derivative: The derivative of a function represents its rate of change at any given point.
Riemann sum: An approximation method for calculating definite integrals by dividing an interval into subintervals and summing up areas under curves within those subintervals.
Fundamental theorem of calculus: States that differentiation and integration are inverse operations, connecting derivatives with integrals.