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semaine du 25 au 29 mai corrigé.pdf Exercice 28. Soit E et F des ensembles. Si A ? E et B ? F montrer que A×B ? E ×F. [000128]. Exercice 29. Soit A = {a1,a2,a3,a4} et B = {b1,b2,b3,b4,b5} 
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