• 2022-05-29
    设[tex=0.929x1.0]zkuxy59wnc0FrSuUc1OFF6pw7am5S+IP5AAfiovVsGI=[/tex] 为[tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]阶可逆矩阵,证明:(1)[tex=7.643x1.643]0idGSV3RW/tbV3escumNdOBN+HUD4iOlYD/Dg1qE7PvBfkfYle1Zz/7DXp+S8Kck2UVYrPaZScDtzkyhg0IfjXaoTWssZcBg08EUfF5pTv8=[/tex](2)[tex=6.429x1.643]0idGSV3RW/tbV3escumNdAgaUKCn8vn8FTueSwlqzL6WT5ebQdPfwlE0x8aUbyu0YSjKhkUimYYFxAXenKmDk7LW5P2D9uUQJDy2/YF/DX5xJN0R7CEykOnOYqu51w0G[/tex].
  • 证明   设[tex=0.929x1.0]zkuxy59wnc0FrSuUc1OFF6pw7am5S+IP5AAfiovVsGI=[/tex]为[tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]阶可逆矩阵. 由于[tex=5.571x1.357]1hFnPJjDtBfeSluDdlTwDS2E+Zmqai0An5F/PDrTXz6zxh/0sixehmuLU4gQHKAvs3NrX0t2fAvhqpy9HHQzzg==[/tex],得 [tex=6.786x2.643]v6h0emw+MX5fBgkKQJsSsI8skzOJQShvO+Y0b+BDva89I7TQiOSoikkbSuu0QE81HmVuS6zjZESh0Kqs7XoMK9WgFWTeI4+YdUcmTZKabOk09bLqZoBKS+q+T07BELvL[/tex].用[tex=1.857x1.214]c5Cf4pRARaBipYntugL/3ie5OUTtMdsQ6cWRbbnRY8c=[/tex]代替等式[tex=5.5x1.357]1hFnPJjDtBfeSluDdlTwDS2E+Zmqai0An5F/PDrTXz6Tw6Yv74HHn17e6/3AvuSg[/tex]中的[tex=0.929x1.0]zkuxy59wnc0FrSuUc1OFF6pw7am5S+IP5AAfiovVsGI=[/tex],便得[tex=26.929x2.643]ysPsVBYgue2sVzMz/Uq3u/uw2JugnTnuu77i17SqcZ+TZlI/9H181rZjqf+qy749xI4xZZeDd5ejkzQgNfVFVDZVC6V8NqlZhtYUk0gvvVSzU2B+/D1ZA7voz8so2G4IwGplKrVNnEPxbTXtAlpqQ+tQ/+vNm+vJpSprAGpRVttkhNmEDp+URhanAQ/09xFHrB8sIZoJmDL5N33Z/lJY5CsgeZVG0ueb4udPCKyfV9jXbRgGCFqwrajvl/kfum25MqJNAq4wwGyvKjph0jfU9AsrGNDN6oFpaH56MZvyeUjnPQCgQuyx9gU/Loqf9C72JZ7KtVxk6LzBWiPU1Gm4d28PJMmcmmjQ9Ak0yzDpZ/7eBQndUHxfpVABgAErmlv/Ke7mpPEvcp6JbUGff6LcYA==[/tex]于是 [tex=7.214x1.643]v6h0emw+MX5fBgkKQJsSsN3spTceaKXiJBawnrOXeeyDJHP77NN7+f9/O1R7HP9hUOAhrHskcPm0O40KWTrLVZcrhq6/W1z4FjC4EyYhprY=[/tex].再用[tex=1.429x1.214]c5Cf4pRARaBipYntugL/3p2GGpQBMesv+fGldldMJeY=[/tex]代替等式[tex=5.571x1.357]1hFnPJjDtBfeSluDdlTwDelg8gAwRgFe7a/t8e0ed/szZjtz7W+FuFEUJ3hlSa4824SjkXuhHk+sKqQ6LsI1Sw==[/tex]中的[tex=1.214x1.214]YsxUk3RpCEL54ROD5kt0RPPW2XVtvzeiNWo/2wW/eZ8=[/tex]得 [tex=12.357x1.643]c5Cf4pRARaBipYntugL/3urJdBSCcXzif8inv7Etmw1mJ5aBudmnGclVpL9egP681iT0rvOGAAw/upcDPDRD3NsgIL1v1+CEv1e/JSmP1WsIFFe3FQWvTEoBkHppsVFe4zF66Ydw4k9cAVbjW/2msUckBWjzkY8dgqvaaDpWS2YEbSL8010zQdtb/0EYC/1rWoW5WK8PaOaJXpadJymrgjlVKDku2+Vb46IklQ8kzz4=[/tex].于是[tex=24.214x1.786]v6h0emw+MX5fBgkKQJsSsP/xi/4RDpZinlyvvSddNDvjVtisfDYvCBmlexj4+9WXsdYcmqYCJoUbpkzvlMRZTzk8UGkZtrGTpOC2gniRe+p9lF5SpCj951HF797wZrMwmT72Cb2LN48jq/KI7ftdu4zm4Hv07jBusDzcOQlQMZn8RquxiSVwXEEZ0+z/fIdT2N/0g94dBr4Bh1LQEkXEeAXt7TGt56ZY60QMkFoMXEE+Vn66Ey+gplInbbrtBxm1JJKcAxJY7yfqAQqwAGNG8v+mE/pf9Iy6tRm7Nd6fBn0xHK8yodjrMo8BeGBw+pscikzb4Np/zCzLL3FT6TrFRtgwtpyy2+iAI9Y5oqFnaSVYWyRdlqax4xlSJxRrlwtJ[/tex]注 上式中第二个等号成立是因为 [tex=7.643x1.786]v6h0emw+MX5fBgkKQJsSsP/xi/4RDpZinlyvvSddNDtftEqqc6R7BlUjiu7YgmQO7BYrvszLS0fZJScszEQJ5OYt2DTUiHAb74yEfCqD1Rt1LnxQqLAzLaPmhj3fTDAi[/tex]这样一个事实.

    内容

    • 0

      以下程序段实现的输出是()。for(i=0;i<;=9;i++)s[i]=i;for(i=9;i>;=0;i--)printf("%2d",s[i]);[/i][/i] A: 9 7 5 3 1 B: 1 3 5 7 9 C: 9 8 7 6 5 4 3 2 1 0 D: 0 1 2 3 4 5 6 7 8 9

    • 1

      写一个文法G,使其语言为不以0开头的偶数集。 A: G[S]:S→AB|BA→AD|CB→2|4|6|8|0C→1|3|5||7|9|B B: G[S]:S→AB|BA→AD|CB→1|2|3|4|5|6|7|8|9C→2|4|6|8|0 C: G[S]:S→AB|BA→AD|CB→2|4|6|8|0C→1|2|3|4|5|6|7|8|9D→0|C D: G[S]:S→AB|BA→AD|DB→2|4|6|8|0D→1|2|3|4|5|6|7|8|9|0

    • 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

      下面语句的输出结果是?range(len('HelloWorld')) A: [1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11] B: 11 C: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] D: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]