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scrieti multimea enumerand elementele;
a). A={x€N/x≤3} 
b). B={x€N/2<x≤7};
c).C={x€N/x+1≤4};
d). D={x€N/3≤x-2≤8};
e).E={x€N/4≤x+2≤10};
f). F={x€N/ x2≤16};
g) G={ x∈N/3x <80  }