
improper integral
Hi all,
Maybe a stupid question, but how to calculate the following integral:
I would like to see what is the method of calculating such integrals, because I don't quite get what is written on Wikipedia:
http://upload.wikimedia.org/math/9/7...7152304b68.png
According to the formula above, I assume it's:
Then I want to use substitution , but I am not sure how the integration limits will change; is it while remains intact? If so, then it would be:
Does it further give something like ?
And, finally, :confused:
I have no idea, that was just my guess.... Thanks for any input. (Smile)

It's ok (Wink), you didn't need to change the t because it's going to infinity.
But: