Improper Integrals

[egeise21]

I would really appreciate a bit of help on the following question, I just am not sure how to even start.

Determine if the following improper integral converges or diverges. If it converges, determine the value that it converges to. The answer should be in exact form.

Find the integral of (xe^(-x)dx) from 1 to infinity.


Please help me!

 

[Deleted member 4993]

I would really appreciate a bit of help on the following question, I just am not sure how to even start.

Determine if the following improper integral converges or diverges. If it converges, determine the value that it converges to. The answer should be in exact form.

Find the integral of (xe^(-x)dx) from 1 to infinity.


Please help me!

For a quick review go to:

http://en.wikipedia.org/wiki/Improper_integral

http://www.sosmath.com/calculus/improper/convdiv/convdiv.html

Then give it a try and show us your efforts.