$\displaystyle \int x^{-3} e^{-2 \over x} dx$

Couldn't figure out what substitution to use for this one.

Thanks.

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- Jul 10th 2008, 09:45 AMchopetWHat is the integral of this function?
$\displaystyle \int x^{-3} e^{-2 \over x} dx$

Couldn't figure out what substitution to use for this one.

Thanks. - Jul 10th 2008, 10:28 AMinvite_moon
Ok!

- Jul 10th 2008, 10:30 AMMoo
- Jul 10th 2008, 10:35 AMnikhil
use ILATE method that will give solution very easily

- Jul 10th 2008, 05:43 PMchopet
Thanks guys. Sometimes when we subst, we get the whole exp term, seomtimes just the power. Substitution is really an art.