TeX Quellcode:

\begin{array}{rclll} f'(x) &=& \dfrac{3x^2-24}{x^3-24x} \cr \cr 0 &=& \dfrac{3x^2-24}{x^3-24x} \cr 0 &=& 3x^2-24 &\vert & -3x^2 \cr -3x^2 &=& -24 &\vert & :(-3) \cr x^2 &=& 8 &\vert & \pm\sqrt{} \cr \cr x_1 &=& \sqrt{8} & \not\in\mathbb{D} \cr x_2 &=& -\sqrt{8} \end{array}