D.6 INTEGRAL FORMULAS
For convenience, we provide expressions for Leibniz's integral rule:
(D.71)
and for integration by parts:
which is written using Riemann–Stieltjes integrals. If the functions are differentiable everywhere on [x1, x2], then and , yielding
(D.73)
For an indefinite integral and suppressing the variable x, (D.72) can be written as
(D.74)
which is the familiar form covered in calculus courses.
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