TeX Quellcode:

\begin{array}{rclcl}\log_{27}\left(\sqrt[3]{9x^2}\right) &=& \log_{27}\left(\dfrac{1}{x}\right) &\vert& 27^* \\\sqrt[3]{9x^2} &=& \dfrac{1}{x} &\vert& ( )^3 \\\\9x^2 &=& \dfrac{1}{x^3} &\vert& \cdot x^3 \\\\9x^5 &=& 1 &\vert& :9 \\\\x^5 &=& \dfrac{1}{9} &\vert& \sqrt[5]{} \\x &=& \sqrt[5]{\dfrac{1}{9}} \approx 0{,}66 \in \mathbb{D}\end{array}