3-Sabendo que o conjunto A = { X E Z / 0 ≦ X < 13} e o conjunto B = { X E Z / - 8 ≦ X ≦ 5}, determine A ∩ B:
a) A ∩ B = { X E R / 0 ≦ X ≦ 5}
b) A ∩ B = { X E R / -2≦ X ≦ 9}
c) A ∩ B = { X E R / -7 ≦ X ≦ 3}
d) A ∩ B = { X E R / - 5 < X < 7}

4 - Sabendo que o conjunto A = { X E Z / 0 ≦ X < 7} e o conjunto B = { X E Z / - 2 ≦ X ≦ 4}, determine A ∪ B:

a) A ∪ B = { X E R / 0≦ X ≦ 4}​
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