∀x P(x)∧∃yQ(x,y)整个谓词公式中只有一个量词。∀x的辖域为P(x),P(x)中的x和Q(x,y) 中的y是约束出现,Q(x,y)中的x是自由出现
举一反三
- 谓词公式∀x(P(x)∨∃y R(y))→Q(x)中量词∀x的辖域是__________
- 谓词公式”x(P(x)Ú $yR(y))→Q(x)中量词”x的辖域是() A: P(x)Ú $yR(y) B: P(x) C: $yR(y) D: (P(x)Ú $yR(y))→Q(x)
- 谓词公式∀x(P(x)∨∃yR(y))→Q(x)中量词∀x的辖域是() A: ∀x(P(x)∨∃yR(y)) B: P(x) C: P(x)∨∃yR(y) D: P(x),Q(x)
- 谓词公式(∀x(P(x)∨∃yR(y)))→Q(x)∧R(x)中量词∀x的辖域是 . A: P(x)∨∃yR(y) B: P(x) C: (P(x)∨∃yR(y))→Q(x) D: (∀x(P(x)∨∃yR(y)))→Q(x)∧R(x)
- 谓词公式"x(P(x)Ú $yR(y))→Q(x)中量词"x的辖域是