TeX Quellcode:

\begin{array}{rcl} f\left(\dfrac{1}{2.048}\right) &=& \genfrac{}{}{1pt}{0}{\sqrt{64}}{\sqrt{8\cdot\frac{1}{2.048}}}-128\\\\ &=& \dfrac{8}{\frac{1}{16}}-128\\\\ &=& 128-128\\ &=& 0\end{array}