TeX Quellcode:

\begin{array}{rcl} f_6(x_s) &=& f_6\left(\dfrac{8}{3}\right) \cr \cr &=& -2 \cdot \dfrac {8}{3} +8\cr \cr &=&-\dfrac{16}{3}+\dfrac{24}{3} \cr\cr &=& \dfrac{8}{3} \end{array}