Integration is the inverse process of differentiation. If the differentiation of a function g(x) is f(x), then the integration of the function f(x) with respect to x is g(x) plus a constant of integration.
From the geometric point of view, an indefinite integral is a colle
• An integral is a mathematical object that can be interpreted as an area or a generalization of area.
• The method of evaluating an integral by reducing it to standard form by a substitution is called integration by substitution.