Question

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

Answer 1

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}