Actually, I think that the answer has to be :
As you're bounded with the x-axis, that is to say y=0, you have to put it in the integral..
or not, I don't know
Th region which is bounded by the curve , the , and the lines and . Show that the volume of the solid formed when is rotated completely about the x-axis is
Why did I get the answer negative? Where did I go wrong?
integrating 2/(x+1)^2 gives you -2/(x+1)
your working looks weird O.o"
ok i found the mistake >.<
you squared the function of y wrongly
the integration should be
integration from 1 to 5 of the function 2^2/(x+1)^2
integration from 1 to 5 of the function (2/(x+1)^2)^2