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Update 12.temporary_ins/04-math-tools/70.systems-of-differential-equations/20.overview/cheatsheet.fr.md

12.temporary_ins/04-math-tools/70.systems-of-differential-equations/20.overview/cheatsheet.fr.md

@@ -86,7 +86,7 @@ avec $`t\in\mathbb{R}\text{  et  } C\in\mathbb{R}^n`$
 <br>   
 **$`\large{
    \begin{align} 
-   \mathbf{X(t)} = & \; C_1\;e^{\,\lambda_1}\;V_1\;+\;  C_2\;e^{\,\lambda_2}\;V_2 \;+\;\cdots \\
+   \mathbf{X(t)} = & \; C_1\;e^{\,\lambda_1\,t}\;V_1\;+\;  C_2\;e^{\,\lambda_2\,t}\;V_2 \;+\;\cdots \\
    & \; \;+\;\cdots  \\
    & \; \;+\; C_n\;e^{\,\lambda_n}\;V_n \end{align}}`$**,   
    <br>