TeX Quellcode:

\begin{array}{rclcl} \dfrac{1}{x} &\geq& 5 &\vert& \cdot x \cr 1 &\geq& 5x &\vert& :5 \cr \dfrac{1}{5} &\geq& x \cr x &\leq& \dfrac{1}{5} \cr \cr \mathbb{L}_1 &=& \left] 0;\dfrac{1}{5}\right] \end{array}