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matrices fix try diofferent syntax #4
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@@ -188,10 +188,7 @@ Soit $E = \mathbb{R}_3[X]$. Soit $u$ l'application de $E$ dans lui-même : $u(P)
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Calculer (si possible) l'inverse des matrices :
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1. $$\begin{pmatrix}
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a & b \\
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c & d
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\end{pmatrix}$$
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1. $\begin{pmatrix} a & b \\ c & d \end{pmatrix}$
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2. $\begin{pmatrix} 1&2&1\\1&2&-1\\-2&-2&-1\end{pmatrix}$
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3. $\begin{pmatrix} 1&\overline\alpha&\overline\alpha^2\\ \alpha&1&\overline\alpha\\ \alpha^2&\alpha&1\end{pmatrix}$
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4. $\begin{pmatrix}0&1&1&1\\1&0&1&1\\1&1&0&1\\1&1&1&0\end{pmatrix}$
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