Thank You Post List (Complete)

[vafa]

کد: [انتخاب]

\documentclass{article}
\usepackage{amsmath}
\usepackage{xepersian}
\begin{document}
\[
\begin{pmatrix}
\sum_{j=1}^{k_i}r_{i_j}a_js_{i_j}&\sum_{j=1}^{k_i}r_{i_j}a_js_{i_j}\\
0&\sum_{j=1}^{k_i}r_{i_j}a_js_{i_j}
\end{pmatrix}
\]
\end{document}