Sunday, June 30, 2013

f(x) = 1/(x^0.6) , 1

To calculate the area, we'll have to evaluate the improper
integral of the function f(x) = 1/(x^0.6) = 1/x^(6/10) =
1/x^(3/5)


y
`oo`


`int`
dx/x^(3/5) = lim     `int` dx/x^(3/5)


1                    
y->`oo` 1


We'll evaluate the definte integral using
Leibniz Newton
formula:


y


`int` dx/x^(3/5) =
F(y) - F(1)


1


We'll calculate
the indefinite integral of the function:


`int` x^(-3/5)dx =
x^(-3/5 + 1)/(-3/5 + 1) + c


`int` x^(-3/5)dx = 5x^(2/5)/2 +
c


F(y) - F(1) = 5y^(2/5)/2 -
5/2


Now, we'll evaluate the
limit:


lim [F(y) - F(1)] = lim F(y) - lim
F(1)


y->`oo` y->`oo`
y->`oo`


lim [F(y) - F(1)] = `oo` -
5/2


y->`oo`


lim [F(y) -
F(1)] =
`oo`


y->`oo`


Since
the limit is infinite, the integral is divergent and the area is not
finite.

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