当个体域为有限集时,如D={a1,a2,...,an},对任意谓词A(x)都有()。
A: ∀xA(x)⇔A(a1)∧A(a2)∧…∧A(an)
B: ∃xA(x)⇔A(a1)∧A(a2)∧…∧A(an)
C: ∀xA(x)⇔A(a1)∨A(a2)∨…∨A(an)
D: ∃xA(x)⇔A(a1)∨A(a2)∨…∨A(an)
A: ∀xA(x)⇔A(a1)∧A(a2)∧…∧A(an)
B: ∃xA(x)⇔A(a1)∧A(a2)∧…∧A(an)
C: ∀xA(x)⇔A(a1)∨A(a2)∨…∨A(an)
D: ∃xA(x)⇔A(a1)∨A(a2)∨…∨A(an)
举一反三
- 当个体域为有限集时，如D={a1，a2，…，an}，对任意谓词A(x)都有( )是正确的。 A: ∀xA(x)⇔A(a1)∧A(a2)∧…∧A(an) B: ∃xA(x)⇔A(a1)∧A(a2)∧…∧A(an) C: ∀xA(x)⇔A(a1)∨A(a2)∨…∨A(an) D: ∃xA(x)⇔A(a1)∨┐A(a2)∨…∨┐A(an)
- 当个体域为有限集时，如D={a1，a2，…，an}，对任意谓词A(x)都有( )。
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