Help with complex integral involving the error function

[rpand4]

I have this question that I have been stuck on for quite sometime. If someone could assist me in solving it then that would be great. Can someone please shed some light?

I have attached the question in a document.

Thankyou

 

[quantumdude]

What have you tried to do on this problem?

 

[jambaugh]

To get started insert the integral definition of the error function into the integral you are doing. View this as a double integral over an area in u,x space. Then look at different ways to evaluate this double integral.