已知[tex=19.214x1.357]I7XvfhDm7qmNlahUCNH41SuUoJ+a9KNgNcuJNqsnOiUFWGuw0+TJ/Ms/6aX77nNxjeAzNN/BEkACm0OKDRfJOy31zLwppO8Q04qmM5lOYIGpdyhZn8GSwuvlB00NW7+ElP3UkodbkmJjDsUQmivtqZOodJG+Hs0vSxQFqcAMjTU=[/tex] 求[tex=3.357x1.357]AELvXZWEUFZPxH8DFI4ouJnT3Iq7Rm9mmRQLbzLu7dQ=[/tex]

 设 [tex=19.214x1.357]stAv5ciwwUJG6qpOxbwl0bpHkApZF5fnBuMRSkEcp6+l5wvLd0bc5Ws173UKhwAB[/tex], [tex=4.857x1.214]gWRjkmdlRCgBEzTr1FAbBA/GJkPoKB5xz20cvWU4+YQ=[/tex] 证明[tex=12.429x1.357]gDvyJF6VQyXSUBj6BV+t3XIG/qGxXv++nOpeOWFtlUSxC+PsStrc1YBEAkehyJmxSA2NzOVxWV5pkXmlLn1hfw==[/tex]

用[tex=0.714x1.0]A/RYZa+bKKYYpjzBS/r5ng==[/tex]变换方法求解下列齐次差分方程。[tex=19.214x1.357]xR2ue3VZoPAqpksZ+8NocDGmMGyKenYOA5zVxD3nglzwQVEHb5kufD6QMggT228A[/tex]

用 [tex=0.714x1.0]RRR4SYyCqv01G5bWEEMPdw==[/tex] 变换法解下列差分方程:[tex=19.214x1.357]p6lLLi8JdFlgAhKX3MZJGikBDmXhPuJpvkPy0b6xJnQBpn4obECtm9bJaCLvQmdPWK9xgXMede3BbizckbyU3A==[/tex][p=align:center]

证明:若  [tex=6.786x1.214]qhFhlFlkb68+lqjstV/87g==[/tex] 则 [tex=19.214x1.357]p1TlMSvF9gGNQE7EkRG3TpEgHTLwvuhgEVEOKIZ1jlDDVy8UWkzvhZudNBXHhwSpezEsBzmcOdH1JRB8W+eI9je+GeZkVCmM00kCSMB2loiJpoY4thpZvWq1/adCseIMao4LpMx20/cySikcrtMdmQ==[/tex] 且包含是严格的. 

已知下列齐次差分方程及初始状态,试求零输入响应。[br][/br][tex=19.214x1.357]lrDHm7mIlcMCpkuu6aAfmJlDeQhnkB9yxnPrR31qJXKAH+ab2GLCtt8krqTjMiZ9[/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}

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)