• 2022-06-19
    证明:设 [tex=0.5x0.786]hycNLgozeED/VkKdun7zdA==[/tex] 与 [tex=0.929x0.786]VF0GLe2VBE/4VKNzpyOfFg==[/tex] 互素, 则 [tex=14.571x1.286]3yDmxXhzuZcoAVcPcBlAZYh2nsZ/N9H8//SAil1aIzRVriOdbwnmwDQyNOJVcFvmJ2CNRCnHTxIE2kkjJZtSdOxrz3foW5kqO0V/HgG+GV8=[/tex].
  •     由 [tex=7.714x1.357]vHLEI04LpIRrhNxwZlMBr1P+b+cY17HGf8V+26bqvUQ=[/tex], 有 [tex=14.571x1.286]3yDmxXhzuZcoAVcPcBlAZUurVrtuoaXdDiEghTgrnNzJGMsc7jSWPobdTIRcK4IrC4UJ3irp/XjxOJ+mgMQkUE+3eyHCw8l8Q7DwX3rNTew=[/tex].[br][/br]    反之, 设 [tex=6.929x1.286]cudTFipO1Gcx3IcAB1CVpYcikLeAGix5P6vZd+a4oqc=[/tex], 有 [tex=4.071x1.357]/6jnjII9ZTmQ9FSGnXpyIGAmPQSpG7JTaX3Fu458TO4=[/tex] 已知 [tex=0.5x0.786]hycNLgozeED/VkKdun7zdA==[/tex] 与 [tex=0.929x0.786]VF0GLe2VBE/4VKNzpyOfFg==[/tex] 互素,由 第 22 题,必有 [tex=2.929x1.357]huOE6rDnnKxYQchTApcF2Q==[/tex], 得证[tex=6.071x1.286]3yDmxXhzuZcoAVcPcBlAZRUK/KslHwftG/DAIj1ITqc=[/tex].

    举一反三

    内容

    • 0

      已知 [tex=0.5x0.786]hycNLgozeED/VkKdun7zdA==[/tex] 为常向量, [tex=8.143x1.357]bruxd7z84Mx+IpT4bKpETLOFrC3GgebYx8q5eBI3pGA=[/tex], 求 (1) [tex=4.0x1.357]uqh+oOvD2P9iqZ7dD7XO1AzJJxbdr7ISK/dH5I4vhEQ=[/tex]; (2) [tex=5.714x1.357]d7QsC9fjElrjgg6wPWL/cIsF33st0tKYbZw+ECX74ls=[/tex] .

    • 1

      设[tex=5.286x2.429]AF7tJRUS5ZpR1VCpS3DR88fHHnERzhCfkiKn1ss2A3M=[/tex],证明积分[tex=4.143x2.643]Q0fk6ySZw1YRWF3qyf64ROmhGDC6eg4s0Miy1VLBQOI=[/tex],当[tex=0.5x0.786]hycNLgozeED/VkKdun7zdA==[/tex]是圆周[tex=3.929x1.429]M0sn/fi/Rz9ean07Tx2wJQ==[/tex]时,等于0 。

    • 2

      求 8 阶自对偶图 [tex=0.786x1.0]LyvDGollVJ+xwurtsLcn0g==[/tex]的边数 [tex=0.929x0.786]VF0GLe2VBE/4VKNzpyOfFg==[/tex] 和面数 [tex=0.5x0.786]U5O66aolbR1y5vuKrQbXNA==[/tex].

    • 3

      设 [tex=5.357x1.214]35cV0l/sbEhGhcNky0b75Q==[/tex] 是半群, [tex=4.143x1.214]jWE/BZ61Jc3ue2kVQW3a3asWbzClVJt3vm2of0H5M5w=[/tex],如果 [tex=1.429x1.214]rkgrF+YaaESwSQDjR6KfWg==[/tex] 都与 [tex=0.5x0.786]hycNLgozeED/VkKdun7zdA==[/tex] 可交换,证明 [tex=2.071x1.0]G9UTBsAN/J31qbWMRPoBXg==[/tex]也与[tex=0.5x0.786]hycNLgozeED/VkKdun7zdA==[/tex] 是可交换的.

    • 4

      证明:若 [tex=0.929x0.786]VF0GLe2VBE/4VKNzpyOfFg==[/tex]是奇数,则 [tex=6.429x1.357]lwn1QerQj4Rc6NmGOU4ahMo+YYFywryfmQv+99ywSdw=[/tex]