Problem: Consider the following integral:$\int_{0}^{1/e} \frac{e^{-xt}}{\ln t} \, dt$In the limit$x \to +\infty$, find approximate behavior of the integral up to and including the leading order in x. Provide your answer in a $\boxed{}$ latex environment.
Solution: $\boxed{-\frac{1}{x \ln x}}$