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A definite integral is a mathematical concept that represents the area under a curve between two specific points on a graph. It is used to find the exact value of an area or the total change in a quantity over a given interval.
The main difference between a definite and indefinite integral is that a definite integral has specific limits of integration, while an indefinite integral does not. This means that the result of a definite integral is a single numerical value, while the result of an indefinite integral is a function.
The standard notation for a definite integral is ∫ab f(x) dx, where a and b are the lower and upper limits of integration, and f(x) is the function being integrated. This notation is read as "the integral of f(x) with respect to x, from a to b".
The definite integral is calculated using a process called integration, which involves finding the area under a curve by dividing it into small rectangles and summing their areas. This process can be done using various methods such as Riemann sums, the trapezoidal rule, or the Simpson's rule.
Definite integrals have a wide range of applications in different fields, including physics, economics, and engineering. They are used to calculate the work done by a force, find the total revenue or profit in business, and determine the volume of irregularly shaped objects or fluids.