Update 12.temporary_ins/32.sets-systems/30.n3/20.systems/20.overview/cheatsheet.fr.md

12.temporary_ins/32.sets-systems/30.n3/20.systems/20.overview/cheatsheet.fr.md

@@ -152,10 +152,10 @@ RÉSUMÉ<br>
   <br>
 
 
-   $`\color{brown}{\Large{\left.\dfrac{dX}{dt}\right\lvert_{\,\bigt} = r\,X(t)}}`$
+   $`\color{brown}{\Large{\left.\dfrac{dX}{dt}\right\lvert_{\,\big{t} = r\,X(t)}}`$
 
   $`\displaystyle\begin{align}
-   \;\;&\Longrightarrow\quad\left.\dfrac{dX}{X}\right\lvert_{\,\bigt}=r\,dt\\
+   \;\;&\Longrightarrow\quad\left.\dfrac{dX}{X}\right\lvert_{\,\big\t}=r\,dt\\
    \\
    &\Longrightarrow\;\underbrace{\int_{X(t_1)}^{X(t_2)}\dfrac{1}{X}\,dx}_{\color{blue}{\begin{array}{c}
    \text{Primitive }\left(\large{\frac{1}{x}} \right)\\ =\;ln\,|\,x\,|\,+\,const.\end{array}}}=\int_{t_1}^{t_2} r\,dt\\