Update fichier-markdown.md

parent f3e60aba
......@@ -30,4 +30,10 @@ Liste numérotée
## Sous-partie 3 : code
$$X^2_{i,j}$$
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$$\begin{array}
{rrr}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9
\end{array}
$$
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