Wednesday, August 7, 2013

Find the area between the line y= x and y = x^2

To find the area betwen  y = x and
x^2.


The intersection points of y = x and y = x^2  is given
by:


x= x^2.


Or x-x^2 =
0.


 Or x(1-x) = 0.


So x= 0 , Or 1-x = 0
, Or x = 1.


So the area between  curves is to be found from x= 0 to
x = 1.


If we draw the graph , y = x  is above x = x^2 from x= 0 to x
= 1 .


Therefore  area  between y = x and y =x^2 is given
by:


Area = Integral (x-x^2)dx from x= 0 to x =
1.


Area = {(x^2/2 -x^3/3 at  x= 1} - {(x^2/2 -x^3/3 at  x=
0}


Area = { 1/2-1/3}- 0


Area = (3-2)/6
= 1/6.


Therefore the area between the curves = 1/6 sq
units.

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