Źródło TeX:

=\left[ \dfrac{\infty}{\infty} \right]\overset{\text{H}}{=} \lim\limits_{x\to +\infty }\,\dfrac{(2x)'}{(e^x)'} = \lim\limits_{x\to +\infty }\,\dfrac{2}{e^x} = \left[ \dfrac{2}{\infty} \right] = 0