How to evaluate the following integral? $$\iint \exp\left(\sqrt{x^2+y^2} \right)\:dx\:dy$$
I'm trying to integrate this using substitution and integration by parts but I keep getting stuck.
How to evaluate the following integral? $$\iint \exp\left(\sqrt{x^2+y^2} \right)\:dx\:dy$$
I'm trying to integrate this using substitution and integration by parts but I keep getting stuck.