1) B={ x ∈ N/-5 ≤ -√x ≤ -2}.
2)C={x ∈ N/27 ≤ 3x² ≤147}.
3)D={x ∈ Z/27 ≤ x² ≤ 49}.
4)E={x ∈ Z/-√8 < x < √8}.
5)F={x ∈ N/x rste p*p si-6 <- √x < 1}.
6)G={x ∈ R/ /x+1/ =6}.
7)H={x ∈ N/ /2x + 1/ =7}.
8)I={x ∈ Q/ / 3x+ 4/2/= 4}.
VA ROG DAU COROANA ....!!!!!!!!!!!!!!
IMI TREBUIESC RAPID....!!!!!!!!!!!