在下列二次型中, 正惯性指数等于 2 的是 未知类型:{'options': ['[tex=13.786x1.571]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKAD1EpX2EG4iGqmx8WmWIijQ/1TBKOkYUR3PceE6jcAcuJWCFZNY7rgfvoZD8hjgnH6mnfX7xFxYsxbeC8J0MU/[/tex]', '[tex=20.0x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMgh6qDu0Esm2hn0XdQHhgVu9qtIccLZ4PooZnR82N9TbDifHftkucc0Q6jUSD/QldaNHWkbnhOWTFIHc8kOCmgQ==[/tex]', '[tex=12.786x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiXRJE291fLQSXdrfPCxIyD0=[/tex]', '[tex=19.5x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiZT9IGbyWQcJ4g2U4WKVdSafU4LRqNlmItRnMTLxj2I+ESRedIlCVJELqkZllvLTdw==[/tex]'], 'type': 102}
在下列二次型中, 正惯性指数等于 2 的是 未知类型:{'options': ['[tex=13.786x1.571]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKAD1EpX2EG4iGqmx8WmWIijQ/1TBKOkYUR3PceE6jcAcuJWCFZNY7rgfvoZD8hjgnH6mnfX7xFxYsxbeC8J0MU/[/tex]', '[tex=20.0x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMgh6qDu0Esm2hn0XdQHhgVu9qtIccLZ4PooZnR82N9TbDifHftkucc0Q6jUSD/QldaNHWkbnhOWTFIHc8kOCmgQ==[/tex]', '[tex=12.786x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiXRJE291fLQSXdrfPCxIyD0=[/tex]', '[tex=19.5x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiZT9IGbyWQcJ4g2U4WKVdSafU4LRqNlmItRnMTLxj2I+ESRedIlCVJELqkZllvLTdw==[/tex]'], 'type': 102}
在下列二次型中, 正惯性指数等于 2 的是 未知类型:{'options': ['[tex=13.786x1.571]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKAD1EpX2EG4iGqmx8WmWIijQ/1TBKOkYUR3PceE6jcAcuJWCFZNY7rgfvoZD8hjgnH6mnfX7xFxYsxbeC8J0MU/[/tex]', '[tex=20.0x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMgh6qDu0Esm2hn0XdQHhgVu9qtIccLZ4PooZnR82N9TbDifHftkucc0Q6jUSD/QldaNHWkbnhOWTFIHc8kOCmgQ==[/tex]', '[tex=12.786x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiXRJE291fLQSXdrfPCxIyD0=[/tex]', '[tex=19.5x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiZT9IGbyWQcJ4g2U4WKVdSafU4LRqNlmItRnMTLxj2I+ESRedIlCVJELqkZllvLTdw==[/tex]'], 'type': 102}
在下列二次型中, 正惯性指数等于 2 的是 未知类型:{'options': ['[tex=13.786x1.571]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKAD1EpX2EG4iGqmx8WmWIijQ/1TBKOkYUR3PceE6jcAcuJWCFZNY7rgfvoZD8hjgnH6mnfX7xFxYsxbeC8J0MU/[/tex]', '[tex=20.0x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMgh6qDu0Esm2hn0XdQHhgVu9qtIccLZ4PooZnR82N9TbDifHftkucc0Q6jUSD/QldaNHWkbnhOWTFIHc8kOCmgQ==[/tex]', '[tex=12.786x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiXRJE291fLQSXdrfPCxIyD0=[/tex]', '[tex=19.5x1.5]CKlOGn/4oc+CIjd/NrEXYL4dkmrBlW2GCC51Nn4jxKDxI5EU0Rj+WwqAYMSi5YHMrpG3Ol8X9Iuj7ckTZPEhiZT9IGbyWQcJ4g2U4WKVdSafU4LRqNlmItRnMTLxj2I+ESRedIlCVJELqkZllvLTdw==[/tex]'], 'type': 102}
下列电池中,电动势与[tex=1.643x1.143]ZcmpEX+ZwRM8FE5sRM0eBQ==[/tex]的活度无关的是 未知类型:{'options': ['[tex=12.071x1.357]PoXlIsM7tbPC9qaqaBPUJ7M0fLIVe5YQZ6xu00vaZWyAxfEowLB3hIbol4A7yFFd7RcAuZkfxBNTCneidNNYWqnGBDUoF0cmafvY/0xDYiI=[/tex]', '[tex=17.286x1.357]PoXlIsM7tbPC9qaqaBPUJ7WQ/8xjeKl47NmO1Y7lNnRgFVsB+HFlqof8cGVJf+o3vRUFQp7cQLuJMAyoD6eY0ft+vcEby6KoMIcFfD/urpS/QwaXqHN3TngfYQ0oSLkGnP+m5geADpV6jRzxZpp4lQ==[/tex]', '[tex=13.786x1.571]ilExYTK31YkfqH7ng/1AlHqSSLQYT215D7HsfxjVSaPcYAM+BeO9/32yQGvHU6/F0Q8/yUHeIuh/kaYFdo+C1C9bNY9P+CvewnPHua92iAE=[/tex]', '[tex=13.857x1.571]tCtfEz5y+KzkLwq9beZ3MfFa43Pa662aE+IZzb0p9VaKGPZBDNUzztm/EsSHquOUMQNGUf0ZZ09uVjsEqohD2ujOkrVkOJPNG5MFVSttGhI8QS+E0ywqdqeUVSc606IMAGbxN3W34FzLqAdwVSmK7Q==[/tex]'], 'type': 102}
下列电池中,电动势与[tex=1.643x1.143]ZcmpEX+ZwRM8FE5sRM0eBQ==[/tex]的活度无关的是 未知类型:{'options': ['[tex=12.071x1.357]PoXlIsM7tbPC9qaqaBPUJ7M0fLIVe5YQZ6xu00vaZWyAxfEowLB3hIbol4A7yFFd7RcAuZkfxBNTCneidNNYWqnGBDUoF0cmafvY/0xDYiI=[/tex]', '[tex=17.286x1.357]PoXlIsM7tbPC9qaqaBPUJ7WQ/8xjeKl47NmO1Y7lNnRgFVsB+HFlqof8cGVJf+o3vRUFQp7cQLuJMAyoD6eY0ft+vcEby6KoMIcFfD/urpS/QwaXqHN3TngfYQ0oSLkGnP+m5geADpV6jRzxZpp4lQ==[/tex]', '[tex=13.786x1.571]ilExYTK31YkfqH7ng/1AlHqSSLQYT215D7HsfxjVSaPcYAM+BeO9/32yQGvHU6/F0Q8/yUHeIuh/kaYFdo+C1C9bNY9P+CvewnPHua92iAE=[/tex]', '[tex=13.857x1.571]tCtfEz5y+KzkLwq9beZ3MfFa43Pa662aE+IZzb0p9VaKGPZBDNUzztm/EsSHquOUMQNGUf0ZZ09uVjsEqohD2ujOkrVkOJPNG5MFVSttGhI8QS+E0ywqdqeUVSc606IMAGbxN3W34FzLqAdwVSmK7Q==[/tex]'], 'type': 102}
下列变量组()是一个闭回路。 A: {x,x,x,x,x,x} B: {x,x,x,x,x} C: {x,x,x,x,x,x} D: {x,x,x,x,x,x}
下列变量组()是一个闭回路。 A: {x,x,x,x,x,x} B: {x,x,x,x,x} C: {x,x,x,x,x,x} D: {x,x,x,x,x,x}
以下谓词蕴含式正确的是(): (∀x) (A(x)→B(x))=>( ∀x)A(x)→(∀x)B(x)|(∀x) (A(x)↔B(x))=>( ∀x)A(x)↔(∀x)B(x)|(∀x)A(x)∨(∀x)B(x)=>( ∀x) (A(x)∨B(x))|(∃x) (A(x)∧B(x))=>(∃x)A(x)∧(∃x)B(x)
以下谓词蕴含式正确的是(): (∀x) (A(x)→B(x))=>( ∀x)A(x)→(∀x)B(x)|(∀x) (A(x)↔B(x))=>( ∀x)A(x)↔(∀x)B(x)|(∀x)A(x)∨(∀x)B(x)=>( ∀x) (A(x)∨B(x))|(∃x) (A(x)∧B(x))=>(∃x)A(x)∧(∃x)B(x)
以下谓词蕴含式正确的是(): (?x) (A(x)→B(x))=>( ?x)A(x)→(?x)B(x)|(?x) (A(x)?B(x))=>( ?x)A(x)?(?x)B(x)|(?x)A(x)∨(?x)B(x)=>( ?x) (A(x)∨B(x))|(?x) (A(x)∧B(x))=>(?x)A(x)∧(?x)B(x)
以下谓词蕴含式正确的是(): (?x) (A(x)→B(x))=>( ?x)A(x)→(?x)B(x)|(?x) (A(x)?B(x))=>( ?x)A(x)?(?x)B(x)|(?x)A(x)∨(?x)B(x)=>( ?x) (A(x)∨B(x))|(?x) (A(x)∧B(x))=>(?x)A(x)∧(?x)B(x)
下列式中错误的是: A: (∀x)(A(x)Úp(x)) Û (∀x)A(x)Ú (∀x)p(x) B: ($x)A(x) Ù p Û ($x)(A(x) Ù p ) C: (∀x)(A(x)ÚB(x)) Þ (∀x)A(x)Ú( ∀x)B(x) D: ($x)(A(x)ÙB(x)) Þ ($x)A(x)Ù( $x)B(x)
下列式中错误的是: A: (∀x)(A(x)Úp(x)) Û (∀x)A(x)Ú (∀x)p(x) B: ($x)A(x) Ù p Û ($x)(A(x) Ù p ) C: (∀x)(A(x)ÚB(x)) Þ (∀x)A(x)Ú( ∀x)B(x) D: ($x)(A(x)ÙB(x)) Þ ($x)A(x)Ù( $x)B(x)
判断下列推证是否正确。 (∀x)(A(x)→B(x))⇔(∀x)(¬A(x)∨B(x)) ⇔(∀x)¬( A(x)∧¬B(x) ) ⇔¬(∃x) ( A(x)∧¬B(x) ) ⇔¬( (∃x)A(x)∧(∃x)¬B(x) ) ⇔¬(∃x)A(x)∨¬(∃x)¬B(x) ⇔¬(∃x)A(x)∨(∀x)B(x) ⇔(∃x)A(x)→(∀x)B(x)
判断下列推证是否正确。 (∀x)(A(x)→B(x))⇔(∀x)(¬A(x)∨B(x)) ⇔(∀x)¬( A(x)∧¬B(x) ) ⇔¬(∃x) ( A(x)∧¬B(x) ) ⇔¬( (∃x)A(x)∧(∃x)¬B(x) ) ⇔¬(∃x)A(x)∨¬(∃x)¬B(x) ⇔¬(∃x)A(x)∨(∀x)B(x) ⇔(∃x)A(x)→(∀x)B(x)
以下谓词公式中,( )不是逻辑有效式。 A: ($x)(P(x)∧Q(x)) Þ ($x) P(x)∧($x) Q(x) B: ("x)(P(x)∧Q(x)) Þ ("x) P(x)∧("x) Q(x) C: ($x)(P(x)∧Q(x)) Û ($x) P(x)∧($x) Q(x) D: ("x)(P(x)∧Q(x)) Û ("x) P(x)∧("x) Q(x)
以下谓词公式中,( )不是逻辑有效式。 A: ($x)(P(x)∧Q(x)) Þ ($x) P(x)∧($x) Q(x) B: ("x)(P(x)∧Q(x)) Þ ("x) P(x)∧("x) Q(x) C: ($x)(P(x)∧Q(x)) Û ($x) P(x)∧($x) Q(x) D: ("x)(P(x)∧Q(x)) Û ("x) P(x)∧("x) Q(x)
以下谓词公式中,( )不是逻辑有效式。 A: ($x) P(x)∨($x) Q(x) Þ ($x)(P(x)∨Q(x)) B: ("x) P(x)∨("x) Q(x) Þ ("x)(P(x)∨Q(x)) C: ($x) P(x)∨($x) Q(x) Û ($x)(P(x)∨Q(x)) D: ("x) P(x)∨("x) Q(x) Û ("x)(P(x)∨Q(x))
以下谓词公式中,( )不是逻辑有效式。 A: ($x) P(x)∨($x) Q(x) Þ ($x)(P(x)∨Q(x)) B: ("x) P(x)∨("x) Q(x) Þ ("x)(P(x)∨Q(x)) C: ($x) P(x)∨($x) Q(x) Û ($x)(P(x)∨Q(x)) D: ("x) P(x)∨("x) Q(x) Û ("x)(P(x)∨Q(x))