Externat Notre Dame Devoir Maison n°1 (2nde ) septembre 2014
Pour prouver le résultat, on peut placer les lettres a, b, c et d dans les quatre cases du bas de la pyramide : on obtient au sommet a + 3b + 3c + d. Si on ...
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moved 60838
moved 97656
moved 27470
moved 231095
moved 130098
moved 231
moved 1421
moved 120454
moved 8750
moved 292942
moved 10356
moved 60838

