• 2022-06-14
    由[tex=8.286x6.357]xbOkdWXE1V4xsD8dsMow0jT0uBKna+SEnqbXAvYSzdUsZeqpBSegECxjkNyHp9WyPsT75wT8HzsWUb44en59dBlnsG0R+SAyCbwDruEr2s2ukCvaCZ3sMnZwIrZhUe5l5IbRiXOjv7cw0umRO3OETVDPirZcPwRzWI8hxUQ1osQ=[/tex]证明:奇偶排列各半
  • 证明    由于 [tex=3.214x1.214]k7ZNCDzKFpCeo2VeLOsUQoaaNFIfrFeienYwObWSWZE=[/tex] 为奇排列时[tex=4.714x1.571]gRxvmD93Li/u5Un3GtLc2x+6HXKrRc6IJaU1WzVw1fg3woR8okYm0sMqV5Lc/Xbm[/tex]为 $-1,$ 而偶排列时为[tex=0.786x1.0]ycpt7/PpiATqHUACAPCXCQ==[/tex]设有[tex=0.571x1.0]rFc/sfAAuCOtzhevhoREeA==[/tex] 个奇排列和[tex=0.357x1.0]Le5Jr6QhXJv1Yp4NjrbGVA==[/tex] 个偶排列 ,则故 [tex=1.929x1.214]OT+AlUfcGczfyAn6xmqhgw==[/tex]即奇偶排列各占一半.

    内容

    • 0

      【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]

    • 1

      由[tex=8.286x6.357]xbOkdWXE1V4xsD8dsMow0jT0uBKna+SEnqbXAvYSzdUsZeqpBSegECxjkNyHp9WyPsT75wT8HzsWUb44en59dBlnsG0R+SAyCbwDruEr2s2ukCvaCZ3sMnZwIrZhUe5l5IbRiXOjv7cw0umRO3OETVDPirZcPwRzWI8hxUQ1osQ=[/tex]证明:奇偶排列各半

    • 2

      设DES加密算法中的一个S盒为: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13 若给定输入为101101,则该S盒的输出的二进制表示为

    • 3

      下面是图的拓扑排序的是?(多选)[img=340x240]1802faef6ebcc2a.png[/img] A: 2 8 0 7 1 3 5 6 4 9 10 11 12 B: 2 8 7 0 6 9 11 12 10 1 3 5 4 C: 8 2 7 3 0 6 1 5 4 9 10 11 12 D: 8 2 7 0 6 9 10 11 12 1 3 5 4

    • 4

      list(range(-1,10,2)) A: [0, 2, 4, 6, 8, 10] B: [-1, 1, 3, 5, 7, 9] C: [0, 2, 4, 6, 8]