Integration Is a Sum

x1

x2

curve

constant line

sine wave

parabola

-2

-1

1

2

1

2

3

4

Area = 2

Integration is a kind of sum. It is easy to realize this by comparing the integration of the function

f(x)=2

with the formula for the area of a rectangle,

b×h

(base times height). Integration is more general, allowing you to find the area under curves such as a sine wave or a parabola.