An integral which is evaluated over an interval. A definite integral is written .
Definite integrals are used to find the area between the graph
of a function and the x-axis. There are many other applications.
a definite integral is the limit of a Riemann
sum as the norm
of the partition approaches zero. That is, .
Theorem of Calculus, integration
methods, integral rules,
by parallel cross-sections, disk
method, cylindrical shell