Answer: A′ ∩ B′.
- A A′ ∩ B′
- B A′ ∪ B′
- C A ∩ B
- D A ∪ B
Correct answer: A. A′ ∩ B′
Explanation: The complement of a union is the intersection of the complements.
A Venn diagram makes set identities visual: A∪B is everything inside either circle, A∩B is only the overlap, and the region outside both circles represents the complement of their union - directly illustrating De Morgan's law (A∪B)′ = A′∩B′.
Concept context
Types of sets, operations (union/intersection/complement), relations, and types of functions with domain and range