Q ∪ Q'
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Answer:
The union of two sets P and Q is represented by P ∪ Q. This is the set of all different elements that are included in P or Q. The symbol used to represent the union of set is ∪. ... We can say that the intersection of two given sets i.e. P and Q is the set that includes all the elements that are common to both P and Q.
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Step-by-step explanation:
Correct option is
A
(P∩Q )∪(P∪Q)
=ξ∩Q
=ξ∩Q
=ξ
(P∩Q) ∪(P∪Q)
=(P∩Q) ∪(P ∩Q )
=(P∪P )∩(P∪Q )∩(Q
∪P )∩(Q
∪Q
′
)
=ξ∩{Q
′
∪(P∩P
′
)}∩Q
′
=ξ∩{Q
′
∪ξ)∩Q
′
=ξ∩Q
′
∩Q
′
=ξ∩Q
′
=ξ
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