TeX Quellcode:

\begin{array}{rclll} 2 &=& \log_8(x^3)+15 &\vert & -15\cr -13 &=& \log_8(x^3) &\vert & 8^{*}\cr 8^{-13} &=& x^3 &\vert & \sqrt[3]{}\cr x &=& \dfrac{1}{8.192} \approx 0{,}00012 \;\in\;\mathbb{D} & & \rightarrow \quad P_2 \left( \dfrac{1}{8.192} \mid 2 \right)\end{array}