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Primul raspuns CORECT are coronita!

Calculati

{1,2,3,4,5}U{1,2,3,4,5,6}=.................

{1,2,3,4,5}∧ {1,2,3,4,5,6}=.................

1.2.3.4.5/1.2.3.4.5.6=............