Răspuns:
a)A=1,2....7,8
d)A=1,2....7,8
a) -9 < x < 9
x∈ (-9,9) (A)
x∈ (-5,8] (B)
A∪B=(-9,9)
A∩B=(-5,8]
A-B=(-9,5]
B-A=∅
b) -8 ≤ x ≤ 8
x∈ [-8, 8] (A)
x∈ [-2, 7) (B)
A∪B= [-8, 8]
A∩B= [-2,7)
A-B= [-8, -2)
B-A= ∅
