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## Homework Statement

y=(1/x) is rotating around the x-axis.

find the volume for the figure between x=1 and x=2

## Homework Equations

## The Attempt at a Solution

V=pi y

^{2}= pi*(1/x)

^{2}

V= 1∫2 pi(1/x)

^{2}dx wich gives V= 1∫2 pi(1/x

^{2})dx

A primitive function for (1/x

^{2}) is -(1/x)

V=1∫2 pi((-(1/2))-(-(1/1)))

How do I go from here?