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determinati multimile a={n|napartineN si (n-5)|12}

Răspuns :

A={n|n€N,(n-5)|12}; (n-5)|12=>n-5€D12;D12={1,2,3,4,6,12}=>n-5€{1,2,3,4,6,12}|+5=>n€{6,7,8,9,11,17}=>A={6,7,8,9,11,17}