与公式("x)(P(x)∧Q(x, y))Þ($x)R(x, y)等值的是()。
A.("x)(P(x)∧Q(x, z))Þ($x)R(x, y)
B.("y)(P(y)∧Q(y, y))Þ($x)R(x, y)
C.("z)(P(z)∧Q(x, y))Þ($x)R(x, y)
D.("u)(P(u)∧Q(u, z))Þ($x)R(x, z)
A.("x)(P(x)∧Q(x, z))Þ($x)R(x, y)
B.("y)(P(y)∧Q(y, y))Þ($x)R(x, y)
C.("z)(P(z)∧Q(x, y))Þ($x)R(x, y)
D.("u)(P(u)∧Q(u, z))Þ($x)R(x, z)
A、前提:("x)(~P(x)ÞQ(x)), ("x)~Q(x) 结论:P(a)
B、前提:("x)(P(x)ÞQ) 结论:("x)P(x)ÞQ
C、前提:("x)(P(x)∨Q(x)), ("x)(Q(x)Þ~R(x)) 结论:($x)(R(x)ÞP(x))
D、前提:("x)(P(x)Þ(Q(x)∧R(x))), ($x)(P(x)∧S(x)) 结论:("x)(R(x)∧S(x))
E、前提:("x)($y)P(x, y) 结论:("x)($y)($z)(P(x, y)∧P(y, z))
F、前提:("x)P(x)∨("x)Q(x) 结论:("x)(P(x)∨Q(x))
G、前提:("x)(G(x)ÞH(x)),~($x)(F(x)∧H(x)) 结论:($x)F(x)Þ($x)G(x)
H、前提:("x)(H(x)ÞM(x)) 结论:("x)("y)(H(y)∧N(x, y)) Þ ($y)(M(y)∧N(a, y) )
谓词公式($x)F(x) Þ ($x)G(x)的前束范式是( )。
A、("x)("y) (F(x) Þ G(y))
B、($x)("y)(F(x) Þ G(y))
C、("x)($y) (F(x) Þ G(y))
D、($x)($y)(F(x) Þ G(y))
谓词公式("x)(("y)Q(y) Þ P(x))的前束范式是( )。
A、"x"y(Q(y) Þ P(x))
B、"x$y(Q(y) Þ P(x))
C、$x"y(Q(y) Þ P(x))
D、$x$y(Q(y) Þ P(x))
为了保护您的账号安全,请在“简答题”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!