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Math A (XLCR) 2017 : corrigé |Stab(x)| = ? x?X. |G|. |o(x)|. = ? o orbite. ? x?X o(x)=o. |G|. |o|. = n|G| o`u n est le nombre d'orbites. On déduit que n = 1. |G|. ? g?G. |Fix(g)|.
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Le Français en ligne Expression écrite exercice 3 raconter au passé ... expression écrite exercice corrigé
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