Definite Integral

An integral expressed as the difference between the values of the integral at specified upper and lower limits of the independent variable.


The definite integral of f(x) between and b represents the area under the curve y = f(x), above the x-axis to the right of the line x = a, and to the left of the line x = b. The definite integral of f(x) = F(b)-F(a) where F is an anti-derivative function for f(x).