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Mathematics for IGCSE & O level - Sets (Section 3 - No. 40)
If P and Q are disjoint sets, then:
P ∩ Q = P
P ∩ Q = Q
P ∩ Q = Ø
P ∪ Q = Ø
Forklaring
Disjoint sets have no elements in common, hence their intersection is the empty set (Ø).
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