Answer
$e-1$
Work Step by Step
Consider $I=\int_{0}^{2} \int_{y/2}^{1} e^{x^2} \ dx \ dy$
or, $=\int_{0}^{1} \int_{0}^{2x} e^{ x^2} \ dy \ dx$
or, $=\int_{0}^{1} 2x e^{x^2} \ dx$
or, $=[e^{x^2}]_0^1$
or, $=e^{1}-e^0$
or, $=e-1$