Posted by T.Gracken on September 19, 2002 at 18:29:14:
In Reply to: Re: I suspect our false doctor or the grump is about. It seems he/she has decided to attempt to soil my screen name. posted by Matt on September 19, 2002 at 10:26:16:
: yes i saw it thank you. im still having much difficulty doing integration by parts when the two parts are an exponential and a sine function though. there must be some step im missing because there never seems to stop being and integral no matter how many times i integrate by parts.
Sometimes when you have that scenario, it is helpful to write the entire equation each step.
This can sometimes lead to an obseravtion that you (may) have the same integral on each side of the equation.
...for (general) example
you might end up with A = stuff - A (where A is the integral, so you could get... 2A = stuff,
or A (the original integral) = 1/2 stuff...
I realize that may seem ambiguous, but think about it for those problems which seem to keep "rolling back on themselves"
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