[[b/c/Capsule # 105 : Fonction de variation nulle et Fonction de variation directe]]
[[c/b/Fonction nulle (exercices)]]![](data:image/png;base64,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)
[[b/c/Fonction directe (exercices)]] ![](data:image/png;base64,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)
[[b/c/Capsule # 106 : Fonction partielle et Rôles paramètre a et b]]
[[b/c/Capsule # 107 : Règle d'une fonction partielle]]