利用[tex=17.357x1.357]PQl1l0a4MCf1jR+u26PB2xnqAMy6f/cWU78yLzY8UOmllrkSB0xYC01l5TrjXZtKVK94VSnFKnXlnbnAZDtdEg==[/tex],[tex=2.143x1.143]KgN4bA7t2v9f/+GMkZKZug==[/tex],求证[tex=14.286x1.286]5teKy8wfU3nhKxPvu1jD7oDzUwwFB1FCgzVlwGwyY2lT0pAzu8rRXEZMUjBUVlEMX7IG2lNg30Lsg2qAFRtCDA==[/tex],[tex=2.071x1.286]3/YH3lhmFpT1qsGHcucVjw==[/tex]。
利用[tex=17.357x1.357]PQl1l0a4MCf1jR+u26PB2xnqAMy6f/cWU78yLzY8UOmllrkSB0xYC01l5TrjXZtKVK94VSnFKnXlnbnAZDtdEg==[/tex],[tex=2.143x1.143]KgN4bA7t2v9f/+GMkZKZug==[/tex],求证[tex=14.286x1.286]5teKy8wfU3nhKxPvu1jD7oDzUwwFB1FCgzVlwGwyY2lT0pAzu8rRXEZMUjBUVlEMX7IG2lNg30Lsg2qAFRtCDA==[/tex],[tex=2.071x1.286]3/YH3lhmFpT1qsGHcucVjw==[/tex]。
设 [tex=17.357x1.357]EtYgeKKl0IPihSLRz5ywOm9ZSAGjIbmIHieYdTE87wzyQkX5/W30o6WpyzVBWhtf[/tex]是实数集上的关系,指出 [tex=0.786x1.0]AOSTmhvIsOwsdZlGoks7dg==[/tex]具有什么性质,并说明理由.
设 [tex=17.357x1.357]EtYgeKKl0IPihSLRz5ywOm9ZSAGjIbmIHieYdTE87wzyQkX5/W30o6WpyzVBWhtf[/tex]是实数集上的关系,指出 [tex=0.786x1.0]AOSTmhvIsOwsdZlGoks7dg==[/tex]具有什么性质,并说明理由.
如果[tex=0.786x1.0]Yn3GgEZev6SOu2r4v1WnCw==[/tex]、[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]、[tex=0.714x1.0]J/aA9EEo0KmJFnWWfX7LmQ==[/tex]、[tex=0.857x1.0]m2DKAQtGuc1DyN3zyNlILg==[/tex]为集合,[tex=17.357x1.357]c3Xi3Sgw0dB6zisJX0Sxv/wfxO1WBRcjBouHvVzd6mjJtHLyBL02tEL+O+QrEzFYzJpdbWmr82YxQqio3Lp22w==[/tex]是否成立?
如果[tex=0.786x1.0]Yn3GgEZev6SOu2r4v1WnCw==[/tex]、[tex=0.786x1.0]ri6gmnf1+J9dGqG5/1sV6A==[/tex]、[tex=0.714x1.0]J/aA9EEo0KmJFnWWfX7LmQ==[/tex]、[tex=0.857x1.0]m2DKAQtGuc1DyN3zyNlILg==[/tex]为集合,[tex=17.357x1.357]c3Xi3Sgw0dB6zisJX0Sxv/wfxO1WBRcjBouHvVzd6mjJtHLyBL02tEL+O+QrEzFYzJpdbWmr82YxQqio3Lp22w==[/tex]是否成立?
令[tex=1.857x1.357]bZ4KhrFbnCaidqbMGQZfww==[/tex]与[tex=1.857x1.357]fBOYuAIZ/H4m1Dx+my86tg==[/tex]是[tex=1.786x1.357]2pFrMmryE2cRTmNCb4YNBA==[/tex]的多项式,而[tex=3.286x1.214]S1r9TKg/0CvhrA1vxbq3mQ==[/tex]是[tex=0.643x1.0]0WA5oCO54gKWR/jKi5M2Zw==[/tex]的数,并且[tex=4.571x1.214]DvNADmYR0N44UyefPGrZQw==[/tex],证明:[tex=17.357x1.357]itMzt+Xq2I3oX3qceqcuTg2rb1617SbxNy8ZuxnMW9NYtbfva+WVRcKx8ltAfW52[/tex]
令[tex=1.857x1.357]bZ4KhrFbnCaidqbMGQZfww==[/tex]与[tex=1.857x1.357]fBOYuAIZ/H4m1Dx+my86tg==[/tex]是[tex=1.786x1.357]2pFrMmryE2cRTmNCb4YNBA==[/tex]的多项式,而[tex=3.286x1.214]S1r9TKg/0CvhrA1vxbq3mQ==[/tex]是[tex=0.643x1.0]0WA5oCO54gKWR/jKi5M2Zw==[/tex]的数,并且[tex=4.571x1.214]DvNADmYR0N44UyefPGrZQw==[/tex],证明:[tex=17.357x1.357]itMzt+Xq2I3oX3qceqcuTg2rb1617SbxNy8ZuxnMW9NYtbfva+WVRcKx8ltAfW52[/tex]
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)
某养殖场司养两种鱼,若甲种鱼放养[tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex](万尾),乙种鱼放养[tex=0.5x1.0]yBR4oiFoTexGaFalQ7m8kg==[/tex](万尾),收获时两种鱼的收获量分别为[tex=17.357x1.357]1sv9Gb0bFe/Iz9r3GZzAg6tPOb85ObkfaD2D15kmwuHk1kXg1+Zm3RX9GFlUXrfEci+gJhTjN4wikbGlCNxohsFxwlXmDjjkhSmDyiCG/g8=[/tex],求使产鱼总量最大的放养数.
某养殖场司养两种鱼,若甲种鱼放养[tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex](万尾),乙种鱼放养[tex=0.5x1.0]yBR4oiFoTexGaFalQ7m8kg==[/tex](万尾),收获时两种鱼的收获量分别为[tex=17.357x1.357]1sv9Gb0bFe/Iz9r3GZzAg6tPOb85ObkfaD2D15kmwuHk1kXg1+Zm3RX9GFlUXrfEci+gJhTjN4wikbGlCNxohsFxwlXmDjjkhSmDyiCG/g8=[/tex],求使产鱼总量最大的放养数.
题图 5-9 所示电路, 已知 [tex=17.357x1.357]FVGHgyQoe3GsQxGj2TFCi000/VkfLAwkseGp9auud8UCWr6JSeYk6WOmYdRbCYUUpGwAQLsrYbC6PdNMoREIiBzX6AhjIpCF7awR8is2xbYYwfFGRhaVIbA/xIFJi4vU[/tex], 求电压[tex=1.714x1.357]PHQU/cbip4o9BavRUlPCmA==[/tex]的零状态响应 [tex=2.429x1.357]SYVMpbYWYdPK6tLI+Cpzhw==[/tex] 、零输入响应[tex=2.286x1.357]J80Hqhlm7lZ7uD37wUdnPg==[/tex] 和全响应 [tex=1.714x1.357]PHQU/cbip4o9BavRUlPCmA==[/tex]。[img=294x185]17b0adf6dcfcedf.png[/img]
题图 5-9 所示电路, 已知 [tex=17.357x1.357]FVGHgyQoe3GsQxGj2TFCi000/VkfLAwkseGp9auud8UCWr6JSeYk6WOmYdRbCYUUpGwAQLsrYbC6PdNMoREIiBzX6AhjIpCF7awR8is2xbYYwfFGRhaVIbA/xIFJi4vU[/tex], 求电压[tex=1.714x1.357]PHQU/cbip4o9BavRUlPCmA==[/tex]的零状态响应 [tex=2.429x1.357]SYVMpbYWYdPK6tLI+Cpzhw==[/tex] 、零输入响应[tex=2.286x1.357]J80Hqhlm7lZ7uD37wUdnPg==[/tex] 和全响应 [tex=1.714x1.357]PHQU/cbip4o9BavRUlPCmA==[/tex]。[img=294x185]17b0adf6dcfcedf.png[/img]
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)