Here's the question you clicked on:
TransendentialPI
Evaluating an integral something like:
as long as f(x) is continuous and differentiable, \[\int\limits_{- \infty}^{\infty}f(x)dx\] is there ever a time we woukd not choose 0 as c in\[\int\limits_{- \infty}^{c} f(x) dx + \int\limits_{c}^{\infty} f(x) dx\]
It's possible that a function is not differentiable at multiple points. Then you would continue to break it up like you've show above and take the limit wherever it is discontinuous.
improper integrals huh
OK, thanks, that's what I was thinking!
you can choose 1 as c or whatever...as long it's within -infinity and +infinity