\( \int x e^{x^2} \, dx = \dfrac{1}{2} e^{x^2} \) \( \int_{0}^{x} x e^{x^2} \, dx = \dfrac{1}{2} \left( e^{x^2} - 1 \right) \) \( \Rightarrow \lim_{x \to \infty} \dfrac{\dfrac{1}{2}\left(e^{x^2} - 1\right)}{e^{x^2}} = \dfrac{1}{2} \)