\documentclass{article}
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\begin{document}
\begin{table}[htpb]
\begin{tabular}{|c|c|c|}\hline
نرخ ورود به گره & نرخ  خروج از گره & حالت \\\hline
$\mu _{1} \pi _{1}=\mu _{0} \pi _{0}$& & $0$\\\hline
$\lambda _{0} + \pi _{0}+ \mu _{2} \pi _{2}=(\lambda _{1} + \mu _{1}) \pi _{1}$ & & $1$\\\hline
$\lambda _{1} + \pi _{1}+ \mu _{3} \pi _{3}=(\lambda _{2} + \mu _{2}) \pi _{2}$ & & $2$\\\hline
$\vdots$ & & $\vdots$\\\hline
$\lambda _{n-1} + \pi _{n-1}+ \mu _{n+1} \pi _{n+1}=(\lambda _{n} + \mu _{n}) \pi _{n}$ & & $n$\\\hline
\end{tabular}
\end{table}
\end{document}