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%% Ein Beispiel der DANTE-Edition
%% Mathematiksatz mit LaTeX
%% 3. Auflage
%% Beispiel 03-01-7 auf Seite 21.
%% Copyright (C) 2018 Herbert Voss
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%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
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http://www.latex-project.org/lppl.txt for details.
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\documentclass[10pt]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\setlength\parindent{0pt}
\setcounter{equation}{3}
\renewcommand\theequation{3.\arabic{equation}}
%StartShownPreambleCommands
%StopShownPreambleCommands
\begin{document}
\begin{eqnarray}
\textrm{rechtsbündig} & \textrm{mittig} & \textrm{linksbündig}\label{eq:eqnarray}\\
\frac{1}{\sqrt{n}} & \frac{\sqrt{n}}{n} & \frac{n}{n\sqrt{n}}
\end{eqnarray}
\end{document}
