下面哪一项是∀ x (P(x)→Q(x))的否定?A.∃ x (P(x)→Q(x))B.∃ x (P(x) ∧ ¬Q(x))C.∃ x (¬P(x)→ ¬Q(x))D.∃ x (¬P(x) ∧ Q(x))
下面哪一项是∀ x (P(x)→Q(x))的否定?
A、∃ x (P(x)→Q(x))
B、∃ x (P(x) ∧ ¬Q(x))
C、∃ x (¬P(x)→ ¬Q(x))
D、∃ x (¬P(x) ∧ Q(x))
发布时间:2025-10-19 01:41:32
下面哪一项是∀ x (P(x)→Q(x))的否定?
A、∃ x (P(x)→Q(x))
B、∃ x (P(x) ∧ ¬Q(x))
C、∃ x (¬P(x)→ ¬Q(x))
D、∃ x (¬P(x) ∧ Q(x))