TeX Quellcode:

\begin{array}{rclll} \mathbb{D} &=& \mathbb{R} \cr\cr f'(x) &=& 160x-16 \cr \cr 0 &=& 160x-16 & \vert & -160x \cr -160x &=& -16 & \vert & :(-160) \cr x &=& \dfrac{1}{10} \end{array}