Integrationof Polynomials

IF f’(x) = axn

Then I = f(x) =

Integration is the process of finding the AREA under a curve and the x-

axis

Area between 2

curves

2

1

1

2I dx

x

1

2 2 1I x x dx 3 1

2 22I x x dx

Finding where curve and line

intersect f(x)=g(x) gives the limits a

and b

Remember to work out separately the

area above and below the x-axis .

1

1

nax

n

5 3

2 24 2

5 3I x x C

12 2

1 2

xI dx

21

2

1

I x

Remember to change sign to + if area is below

axis.

f(x)

g(x)

A= ∫ f(x) - g(x) dxb

a

2 1