TeX Quellcode:

\begin{array}{rclll} f\left(\dfrac{11}{9} \right) &=&\dfrac{1}{4} \ln\left(9\cdot \dfrac{11}{9}-10\right) &=& \dfrac{1}{4} \ln(1) = 0 \quad \rightarrow \quad P_1\left( \dfrac{11}{9} \mid 0 \right)\end{array}