Problem: Find a uniformly valid approximation to the solution of $\epsilon y''(x) - 2y(x) = e^{-x}$ with boundary conditions $y(0)=0, y(1)=1$ in the limit $\epsilon \to 0^+$. Use only the variables and constants given in the problem; do not define additional constants. Place your final solution in a $\boxed{}$ LaTeX environment.
Solution: $\boxed{y(x) = -\frac{1}{2} e^{-x} + \frac{1}{2} \exp\left(-\sqrt{\frac{2}{\epsilon}}x\right) + \left(1 + \frac{1}{2} e^{-1}\right) \exp\left(-\sqrt{\frac{2}{\epsilon}}(1-x)\right)}$