离散数学求解答 30
找出推理错误的地方:(1)∃x(P(x)∧Q(x))P(2)P(c)∧Q(c)ES(1)(3)P(c)T(2)I(4)∃y(R(y)∧S(y))P...
找出推理错误的地方:
(1)∃x(P(x)∧Q(x)) P
(2)P(c)∧Q(c) ES(1)
(3)P(c) T(2) I
(4)∃y(R(y)∧S(y)) P
(5)R(c)∧S(c) ES(4)
(6)R(c) T(5)I
(7)P(c)∧R(c) T(3)(6)I
(8)∃x(P(x)∧R(x)) EG(7) 展开
(1)∃x(P(x)∧Q(x)) P
(2)P(c)∧Q(c) ES(1)
(3)P(c) T(2) I
(4)∃y(R(y)∧S(y)) P
(5)R(c)∧S(c) ES(4)
(6)R(c) T(5)I
(7)P(c)∧R(c) T(3)(6)I
(8)∃x(P(x)∧R(x)) EG(7) 展开
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