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UGC-NET | UGC NET CS 2018 July – II | Question 85

The equivalence of ¬∃x Q(x) is:
(A) ∃x ¬Q(x)
(B) ∀x ¬Q(x)
(C) ¬∃x ¬Q(x)
(D) ∀x Q(x)

Answer: (B)
Explanation: This is simple property for negating Quantified, 

¬∃x Q(x) = ∀x ¬Q(x)

So, option (B) is correct.
Quiz of this Question

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