y=(1/x) is rotating around the x-axis.
find the volume for the figure between x=1 and x=2
The Attempt at a Solution
V=pi y2 = pi*(1/x)2
V= 1∫2 pi(1/x)2dx which gives V= 1∫2 pi(1/x2)dx
A primitive function for (1/x2) is -(1/x)
How do I go from here?