TeX Quellcode:

\begin{array}{rcl} f(0) &=& \dfrac{7}{8} \sqrt{-63\cdot 0+9\cdot 0^2} \\\\ &=& \dfrac{7}{8} \sqrt{-63\cdot 0+9\cdot 0^2} \\\\ &=& \dfrac{7}{8} \sqrt{0} \\\\ &=& 0\end{array}