# Math Help - improper integral involving e

1. ## improper integral involving e

See attachment.

2. You can find $\int xe^x~dx$ using integration by parts.

Do you know this method?

3. Originally Posted by pickslides
You can find $\int xe^x~dx$ using integration by parts.

Do you know this method?
yah its like uv- integral of vdu

so is it xe^x - e^x ?

4. Originally Posted by WartonMorton
yah its like uv- integral of vdu

so is it xe^x - e^x ?
Sounds good.

5. so thus the improper integral is -1 ?

6. That's what I get.