Saturday, March 3, 2012

Caluculate the area bounded between the curve f(x) = (x^2-5x)/x^3 and x=1 and x= 2

f(x)- (x^2-5x)/x^3


Let us
simplify.


==> f(x)= x^2/x^3 -
5x/x^3


==> f(x)= 1/x
-5/x^2


==> f(x)= 1/x -
5x^-2


==> Now we will find the
integral.


==> Int f(x)= Int 1/x - 5x^-2
dx


==> Int f(x) = ln x - 5x^-1/-1  +
C


==> Int f(x) = lnx +
5/x


Now we will find Int
f(2)


==> F(2) = ln2 + 5/2 = 2.5 + ln
2


==> F(1) = ln1 + 5 =
5


Then the bounded area is F(2) -F(1) = 2.5 +ln2 - 5 =
-1.81


==> Then the area is 1.81 square
units.

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