求下列函数的傅氏变换[tex=9.429x2.786]4Y5+7CBWNCiYQHxVyE7p5TGW23Q5SHywTkTn6vFRIo/cGEITImMDLVJvoexVhKJ2IBeOf2p7GVA8PxsEVmb1ji4UsarlEdoE3xJAk2X0l1uOPw9pTRRMrQw5XFYzx21T[/tex]

判定下列直线是否平行, 是否垂直?[tex=7.071x3.929]BxHmN/2SNzvKB/c4Fmh6Vj930uQqjQ8DCX0f9q0Iyt7vNE28fsiOc8koqaCO5QK4VDmAoQvBvxrxKidG/ELQxUvtBtNim2QsZW03y4+q7Sg=[/tex]和[tex=9.429x2.786]u6kj1qzdc6j5LZ2ETcZ/qij3Mxd30UNftInVpwkTpfwPEhGfCqPtvQ0mDkjEv/4hNjwy6SIN37S/r/BfYnMlyeOHp0L43Dp9bFLJmhTJ6RY=[/tex].

如图T 3.2,平板电容器(忽略边缘效应)充电时,沿环路[tex=2.571x1.214]NZxNTukrgZePMi3zNHjqyE8o1SfkVoVGrBoAw1CbjUk=[/tex]磁场强度H的环流中,必有 未知类型：{'options': ['[tex=9.429x2.786]CdklRqV/wxrsKm0Wv8W/Y5kFaNBd/oWluiFpBFarM4usi1Js9U2VEPa1U+py2oxypCprhFwpG53JxEhsdz+BnQ==[/tex]', '[tex=8.857x2.786]ZX01Nlk+I4lCpnVYoOlZWifgEJHDrZcw5FmWBEUifmCjGkf7SPVr90zzvU4+ZJYXuVXbZc/BKxBDJ2mjs4ra5g==[/tex]', '[tex=9.429x2.786]CdklRqV/wxrsKm0Wv8W/Y8o5rKRADZ6bzJTJxyM4U//32+pAwoUxGnS74MG5KdbUi3llPx8cfiqiNxJ5E5GRfA==[/tex]', '[tex=5.357x2.786]CdklRqV/wxrsKm0Wv8W/YxrgD/gMEXsDFsWMCKqe9wDiYwd169/pDrh/fGYVF2py[/tex]'], 'type': 102}

设 [tex=9.429x2.786]w70lG1NUs5ZRhKHaXMaifahNYA2l55OVx/YI5vl5IU5iq/xPFBH6Il3q+vaeQh30i22Yd5ZjSueyEM8w70yMZrUx5/JF/1JMiryIcjprL7WN2vUh/y9lOBKhDh4JP9JT[/tex] [tex=14.214x3.357]FgiJWgRQAKO6KUAKNMtpr1qPsSDviTV19GAnhgnqg1iUuGU1jPJ18aWTmT2S8eSg9IyFgtSUXSzrDfAuUnODErYLzVCb99H6RGD+++jZFzKP78Z3ekrpRgQdj1yCqHR4[/tex]求 [tex=2.929x1.286]sv6gj8mHdRGoH45zMXTYwA==[/tex] 和 [tex=2.929x1.286]+0riMsndTbnEliRL5fDJLA==[/tex]. 

求以下函数组所确定的反函数组的偏导数.[tex=9.429x2.786]M/Yeox5bOq02SPK7XRukbwqAzZQ+xPAVgNqS71WcMvWij9dSj7QBr+SVlpyh9NrlWDDdwFtM1NF+jSBw/0M7PYY2+iMPyXhkSED/36w/A1MJTVWbZcev01qvQm9DCPdd[/tex],求 [tex=1.0x1.286]XjC71rgNhKQgK1xl0yY3qQ==[/tex] , [tex=1.0x1.286]GIYaRW5dpnupZT4sBT5/Fg==[/tex], [tex=0.929x1.286]1+p7I8xs4LC7jJPQFgolZw==[/tex], [tex=0.929x1.286]CyTV3tyq0sF5fN0QA93XHA==[/tex].[br][/br]

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)

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)