$\{\begin{array}{ll}x\prime =& Ax+By\\ y\prime =& Cx+Dy\end{array}$

where $A,B,C,D$ are constant.
The difficulty of the exercise varies considerably
with the choices of several parameters.
Other exercises on:

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- Description: recognize the phase graph of a given ODE. serveur web interactif avec des cours en ligne, des exercices interactifs en sciences et langues pour l'enseigment primaire, secondaire et universitaire, des calculatrices et traceurs en ligne
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