Question

scrie toate submultimile multimilor {1,2} {1,2,3} {a,b,c}

Answer 1

{1,2}  submultimile {1}  si {2,}

{1,2,3} submultimile {1,2}. {2,3}, {1,3}, {1}, {2}, {3}

{a,b,c} submultimile {a}, {b}, {c},(a,b}, {b,c}, {a,c}