For an integral like
I know the PFD would be written something like
But would that be the same as ? I was going to type it into a calculator and test, but I thought it might be quicker to ask somebody here.
Yes...it will do no harm to the integration because the variables are written with out the loss of generality.
the only thing that will change is the new values of A and B..., just the old B becomes the new A and the old A becomes the new B, nothing else