∫Definite Integral Calculator
e.g. x^2, sin(x), sqrt(x)
A definite integral computes the net signed area between a function f(x) and the x-axis over an interval [a, b]. It is one of the two fundamental operations of calculus (the other being differentiation) and is the basis for computing areas, volumes, arc lengths, work, probability, and much more. The Fundamental Theorem of Calculus connects integrals to antiderivatives.
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