设矩阵[tex=10.857x3.643]QN0fTQbn6M33pU3gx/S2slpai2W6Mb1MQwcHUYa4aOh/Hur37F1k+/Dc51hChLYxr2pg005MJvX8EXs3eNzw3sta7xOeU8h3z86SMHdkuq1Ib9jfDIBMU5EQ4hhV3uktXAx2o9VoST1vo/qQaOTmOw==[/tex],[tex=11.643x3.643]opqi7S5YyIUs5JQiNQr2vPz4v1o0YqoiQ8K8iwD4xEu5ldrfKVpqtlabsT2Jp6ZTp+mnaQdQn6tiVnecDeyGy+kIpYY1NVIUOEg5NxXVMOEnS3p4oHxkqgnescjnsxbvbsOMIJY5MOeQYx3uW2APAA==[/tex]求: [tex=5.786x1.357]u0Ja2Ez0ZVzME8AnYPD/2UD8aWGQVCLX9jay7yQGlto=[/tex]
设矩阵[tex=10.857x3.643]QN0fTQbn6M33pU3gx/S2slpai2W6Mb1MQwcHUYa4aOh/Hur37F1k+/Dc51hChLYxr2pg005MJvX8EXs3eNzw3sta7xOeU8h3z86SMHdkuq1Ib9jfDIBMU5EQ4hhV3uktXAx2o9VoST1vo/qQaOTmOw==[/tex],[tex=11.643x3.643]opqi7S5YyIUs5JQiNQr2vPz4v1o0YqoiQ8K8iwD4xEu5ldrfKVpqtlabsT2Jp6ZTp+mnaQdQn6tiVnecDeyGy+kIpYY1NVIUOEg5NxXVMOEnS3p4oHxkqgnescjnsxbvbsOMIJY5MOeQYx3uW2APAA==[/tex]求: [tex=5.786x1.357]u0Ja2Ez0ZVzME8AnYPD/2UD8aWGQVCLX9jay7yQGlto=[/tex]
设矩阵[tex=10.857x3.643]QN0fTQbn6M33pU3gx/S2slpai2W6Mb1MQwcHUYa4aOh/Hur37F1k+/Dc51hChLYxr2pg005MJvX8EXs3eNzw3sta7xOeU8h3z86SMHdkuq1Ib9jfDIBMU5EQ4hhV3uktXAx2o9VoST1vo/qQaOTmOw==[/tex],[tex=11.643x3.643]opqi7S5YyIUs5JQiNQr2vPz4v1o0YqoiQ8K8iwD4xEu5ldrfKVpqtlabsT2Jp6ZTp+mnaQdQn6tiVnecDeyGy+kIpYY1NVIUOEg5NxXVMOEnS3p4oHxkqgnescjnsxbvbsOMIJY5MOeQYx3uW2APAA==[/tex]求: [tex=6.286x1.786]CdGhbbeT/sN7adYadmo9oCgcSiA9Ws7Cs03GAAUbllELGYg/13rpb/e/3v5+fLhb[/tex]
设矩阵[tex=10.857x3.643]QN0fTQbn6M33pU3gx/S2slpai2W6Mb1MQwcHUYa4aOh/Hur37F1k+/Dc51hChLYxr2pg005MJvX8EXs3eNzw3sta7xOeU8h3z86SMHdkuq1Ib9jfDIBMU5EQ4hhV3uktXAx2o9VoST1vo/qQaOTmOw==[/tex],[tex=11.643x3.643]opqi7S5YyIUs5JQiNQr2vPz4v1o0YqoiQ8K8iwD4xEu5ldrfKVpqtlabsT2Jp6ZTp+mnaQdQn6tiVnecDeyGy+kIpYY1NVIUOEg5NxXVMOEnS3p4oHxkqgnescjnsxbvbsOMIJY5MOeQYx3uW2APAA==[/tex]求: [tex=6.286x1.786]CdGhbbeT/sN7adYadmo9oCgcSiA9Ws7Cs03GAAUbllELGYg/13rpb/e/3v5+fLhb[/tex]
甲,乙两人在约定的一小时内到某处会面.设甲,乙的到达时刻[tex=2.643x1.286]Rf0fxbExYV4w1YT1xkfOLQ==[/tex]相互独立,其密度函数分别为[tex=11.5x3.643]FjHqR6phlwO1Ta6NkREN40hfsf1gVws5Ihev2POrZvORZHWqicxB3MSWNyXOHE9j1LpAkzcbw0qAYPZz31uGlLaJB/bJMhT4zFa3Uf4hU/I=[/tex][tex=10.857x3.643]1Nh+R/f4RomLEmtVwEpeqwCRcKZ4A7x0fi7K1baVy9w/pIqBzFMYJQf0rFDZ2Qz8BYNgAl9A4Gg7A2B0KmJZMkZNmUimBj0NA1sGelZEJY8=[/tex]求先到者等待时间的数学期望.
甲,乙两人在约定的一小时内到某处会面.设甲,乙的到达时刻[tex=2.643x1.286]Rf0fxbExYV4w1YT1xkfOLQ==[/tex]相互独立,其密度函数分别为[tex=11.5x3.643]FjHqR6phlwO1Ta6NkREN40hfsf1gVws5Ihev2POrZvORZHWqicxB3MSWNyXOHE9j1LpAkzcbw0qAYPZz31uGlLaJB/bJMhT4zFa3Uf4hU/I=[/tex][tex=10.857x3.643]1Nh+R/f4RomLEmtVwEpeqwCRcKZ4A7x0fi7K1baVy9w/pIqBzFMYJQf0rFDZ2Qz8BYNgAl9A4Gg7A2B0KmJZMkZNmUimBj0NA1sGelZEJY8=[/tex]求先到者等待时间的数学期望.
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))