ok so maybe im just being stupid here...
so by using integration by parts....
so is that right? if so, pluging in doesn't really make sense or give me an answer that looks right!
any help will be much appreciated!
Try putting ever larger numbers in place of infinity,
you will find that it quickly gives you smaller and smaller answers.
In the LIMIT it TENDS toward zero.
Infinity is of course a mathematical construct that has NO "real" existance
(I'm sure some people would argue with that!)
But it is useful...