Question

If A = {x I x ∈ Z, 4 ≤ (x + 1)² < 25}, B = {-2, -1, 0, 1, 2}, then find A ∪ B and A ∩ B.

Answer 1

A={1,2,3}
AUB={-2,-1,0,1,2,3}
A&B={1,2}