38. (2023春•靖江市校级月考)已知曲线y=ex−1y=e^{x-1}y=ex−1与曲线y=axy=a\sqrt{x}y=ax存在公共切线,则实数aaa的取值范围为 ___(0(0(0[,]ln2e]ln\sqrt{\frac{2}{e}}]lne2]___.