已知[tex=5.286x1.357]Hfi9fqZ0S9tyxnNprETOZQ==[/tex]，[tex=5.214x1.357]1ZKzFIyAGx3itb2qtVH69g==[/tex]，[tex=5.214x1.357]B5E5Uls4epYDxUN96wdVcQ==[/tex]，求①[tex=2.214x1.143]0r4yD2FUhMBrZI0Ja3cQ+A==[/tex] 和 [tex=2.214x1.143]dBailWBF5fnw0+lpWlSW3w==[/tex]；②[tex=9.214x1.357]kQnZGvmTpsjZ9mRdULW8Yk0BsEA7Heb4GEm7ZlExkhM=[/tex]；③[tex=4.143x1.357]dzMrctjTxsEWbo0LPplRLNheTPWmf0bwJTTOAtM2vAg=[/tex]和[tex=4.143x1.357]uiZj/NtXcQzZ1YhLcYPC+VKQmf4krR6xum5ZCaZcV/o=[/tex]；④[tex=4.643x1.357]mYudu4hCS+Lfb4CA1kmzuk0JsvuG1VzazALUYw0OIQ8=[/tex] 和 [tex=4.643x1.357]3m2flxkekJDyckbVXNlJ4N5uAlz/6TXVcZzU2ZyOZY0=[/tex].

2022-05-29

已知[tex=5.286x1.357]Hfi9fqZ0S9tyxnNprETOZQ==[/tex]，[tex=5.214x1.357]1ZKzFIyAGx3itb2qtVH69g==[/tex]，[tex=5.214x1.357]B5E5Uls4epYDxUN96wdVcQ==[/tex]，求①[tex=2.214x1.143]0r4yD2FUhMBrZI0Ja3cQ+A==[/tex] 和 [tex=2.214x1.143]dBailWBF5fnw0+lpWlSW3w==[/tex]；②[tex=9.214x1.357]kQnZGvmTpsjZ9mRdULW8Yk0BsEA7Heb4GEm7ZlExkhM=[/tex]；③[tex=4.143x1.357]dzMrctjTxsEWbo0LPplRLNheTPWmf0bwJTTOAtM2vAg=[/tex]和[tex=4.143x1.357]uiZj/NtXcQzZ1YhLcYPC+VKQmf4krR6xum5ZCaZcV/o=[/tex]；④[tex=4.643x1.357]mYudu4hCS+Lfb4CA1kmzuk0JsvuG1VzazALUYw0OIQ8=[/tex] 和 [tex=4.643x1.357]3m2flxkekJDyckbVXNlJ4N5uAlz/6TXVcZzU2ZyOZY0=[/tex].

答案：

①[tex=34.5x3.929]4jmWSLrSo8mkCBEsrx0JGSkm+vrjYCEWi8zOGftAkZrAg5Ylw0A4p1bJlQ59n8fvH8Kv4mE9zCfgUrdoOcv01dybD+orfYldJWio8+2xCAp9DpaoFgzvyiRvq/NoXwMgI8gxi4rrKoDzBMWOWNFK4KZnBxI2veY0yewFH74npSjX7TiRtO1qhNqY1rHtZEKASi0qLYVVpFdiXagoU5ICCfO56eX+Ffk/BhPaejLS4yGqh1XRyEJYVTo64oGpPrOfs4Pjve3bYxKFebCVnE93Pq4lqvdhAI6oKa/ErV8PHEY7YQonicSSa8WldcP5xWPdeUYBbfypuPeqRbXt5ORG3SMWZoHLMcbhDS4ll5KLQmLpC1rKECJJsWEqFQFRmfW7E9BfxgyZUQbZ8ESOaOUb3A==[/tex]，[p=align:center][tex=9.929x1.357]C1E9u++ZCLvzq7wuClvRlIsBTP59/mayI2yTkks+eAfMhfmRhDJp/R8ip9KnG1d8[/tex].② [tex=27.286x1.357]Mgu3m6s8u/krpj9mGZmC/83YAn1wxj+5wD3C/PX4j0DZBrT16lj65jSJLYFvwOqK8KJ/SUOHkHhZEENuPHTTCc1AjGKQS0/KoVUWx+emQik=[/tex]，[tex=20.071x1.357]UEh/fKN/vE5jRvVhjBZCfpKv6YGur/lBk9XkU8RaxQVkud7liXLo/LdCg2uhtZhu[/tex]，[tex=17.643x3.929]kQnZGvmTpsjZ9mRdULW8YiwJZFC7VdavcaII0p+a2xLLTNqqcumHZkhOoJd/Hb5ZSlCMvlcfm63q1iondoaJVmU2PFI+6e8kEAyxysGeSRr1YTcueTuGfmeKB/WVL0Q6AoKaCmFJxDtPgR36CAmzpg==[/tex][p=align:right][tex=19.429x2.786]MmQIRSnGjfDCB3s3hARNS2dC7rH02PgNk5d2gAmCo5Yv9HHCCZEypFVc13Q2AjdBUWwkTrU/JupIoPsTgLsFjwmk5A7HMn51pmXz7cAFgd9ZuIahgwUeqxKZ0TT3JkDfMDJMuxjNadW2sGJrxCp1EhzB+4YPll+HeLyobeDL4+13KNAz8TWumyCSDqV2DuNhdtntPVspSzKkuJLCyNlLFQ6hut7DyBVNCU2MoC97Ee/dSSrXFlAKRmnr7Ogi1M9pEIS1JHdc4vmPoJkB+MXSuQ==[/tex]                                 [tex=5.0x1.357]shMsQ7oUyL3IUcEa8Q9oUg==[/tex].③             [tex=14.786x3.929]dzMrctjTxsEWbo0LPplRLFuBJ6+P8kYwLFiYuG5WxnvLHkSPsvsHyTSeyEXwcX+WZiwn/U1YZ8n+irdE9hv0jakm1Af3wqvunVtjqcNgVpsTD3+7pnzySaOAla9HGaZV+JhUIFogwA4pKO3c/djALQ==[/tex] ，[br][/br]                 [tex=11.071x1.357]uiZj/NtXcQzZ1YhLcYPC+RhjNIPqVGMFBcfdMhHR9D+rWzcjq/SVd23uTIaFffVjrNYsBYx1/n4MaX/w9P/TmA==[/tex].④             [tex=12.0x1.357]mYudu4hCS+Lfb4CA1kmzupMb6WIiRw9IhtB0ibWk96eySq/7NoW9pCsX2z0o4MTQpxKP0r0F7TEkAAkdU68eww==[/tex]，                                  [tex=18.714x1.357]mnNkLgr4hJgc/vlKdr2oEryp+lIBJNG/birh1daovvdK6n8hy/vV+PiK4hsBhNtl[/tex]                                  [tex=9.5x1.357]ZS2gKvzJjiuq16xbfRlOHbv/d0NIdXC2a5lJxd8NBRw=[/tex]                                  [tex=4.786x1.357]TBA5IaH11rKhmUrvnGA2bQ==[/tex].或由 ①的结果有[tex=37.643x3.929]mYudu4hCS+Lfb4CA1kmzuvwtZ6aKuMCU2yskuciEc3KAP9qX8jOvjbWu+yJXIazE+cPOPTcWYqBfiWvE4bItBlNKuiRiSe/MhJLHhg1gr9OBdmn13kBkxnZvu/MYU9kIQPC3SAykJeqP8Xk0Bjok2lur4gfXbO6Mqw0H427DSye1RZu0D68GqdVQNQvgGI/vXp/eDXjbszJ7UV2VtVEAmwtcW7SXj5H3qwsrBKKOxHtHJ8SLukNBC5LIkamD/Y5uAeGTF9kAQ5l9Vh6p4lnzxyduLgV0hlarV+l8loeTR45MvaX+pgBQppACBpbSpaStozT1vf6HFdV3qq0bTFtH6ZNoregJM6+QokUvuVshpBaM7N+9hSX/UPWMrvQz+XI20gM20nLEgGwa+iecYMxkUw==[/tex].                 [tex=12.0x1.357]X5cZLNWyU3Rg+iOVPb3cKXNN3AviSP0Vp+QEUSpPusAxdU9xb88ek12oYkHFGAGhlYrGSah/3BorStXYTQDSwQ==[/tex]                                  [tex=17.929x1.357]mnNkLgr4hJgc/vlKdr2oEjBh2VagIdTfGYGxb7+qw5WpFVZt5vk2qhZZWwooc2Q+[/tex]                                  [tex=9.5x1.357]uesXroyWRbo0qLCI+1qNwtbXiG7SE8pqRTWHmQ7EZ3o=[/tex]                                  [tex=5.5x1.357]+ejP6P0wAHvwUW/liCYpXA==[/tex].或先算 [tex=2.143x1.143]jp8DvzKn3+56E3kfD79X2w==[/tex]，再算[tex=4.643x1.357]X5cZLNWyU3Rg+iOVPb3cKWSBkx4Fa2VjQz7bPa4iOs4=[/tex].

举一反三

内容

0
set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为？ A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
1
采用基2时间抽取FFT算法流图计算8点序列的DFT，第一级的数据顺序为 A: x[0],x[2],x[4],x[6],x[1],x[3],x[5],x[7] B: x[0],x[1],x[2],x[3],x[4],x[5],x[6],x[7] C: x[0],x[4],x[2],x[6],x[1],x[5],x[3],x[7] D: x[0],x[2],x[1],x[3],x[4],x[6],x[5],x[7]
2
采用基2频率抽取FFT算法计算点序列的DFT,以下()流图是对的。 A: x[0]，x[1]，x[2]，x[3]，x[4]，x[5]，x[6]，x[7] B: x[0]，x[2]，x[4]，x[6]，x[1]，x[3]，x[5]，x[7] C: x[0]，x[2]，x[1]，x[3]，x[4]，x[6]，x[5]，x[7] D: x[0]，x[4]，x[2]，x[6]，x[1]，x[5]，x[3]，x[7]
3
下列方程中是一阶微分方程的是[input=type:blank,size:4][/input]. 未知类型：{'options': ['[tex=8.0x1.571]SnLzj4UlSfnGqNtEzxfZSuZwslGsWxsvP2Y+yf7H578Vefe1Ol/nJT135DjkdnSNNikL3arAj80BjvPHaHCDiA==[/tex]', '[tex=10.571x1.571]JR4yrHJRIZfJXwhFSObwrfajFnWUvXzM/YiA3M6aDKuVBZ8I+7v5iXTXdA3E6Rm4vOE2BCfPwFP2rmRygXKEUDk1qLsNDCJ2p8GEbfCSr2s=[/tex]', '[tex=5.643x1.357]m0sKckxx+jZ9iltApBtB23TBISIOx/g0judcsS+akNFZrUNCq3g+BIVQwGbQEh/C[/tex]', '$y^{(4)}+5 y^{\\prime}-\\cos x=0$'], 'type': 102}
4
设有如图2.16所示的关系R，W和D，计算:(1)[tex=5.214x1.357]XUb2uC9BSxYVlKmwvzNHTGOIc3/MgF5L931wK4U9Pt0=[/tex](2)[tex=10.357x1.357]XNP+O/OgJeEtbTxWJIRBVg6lskpsMJCX/lTDOusl3oL5cUYrSXHc8Uq+8rrCrWcy[/tex](3)[tex=5.214x1.0]Hv7mQrmD00tN7RXEn3HVzDMVdYHvnBbVpejVq+9yAwQ=[/tex](4)[tex=12.5x1.5]nNjfYmySekVxziqkCT16/DEViTS+s/iqCc4QDIdYqkGeySqGf54ZTxwAorkdnAAnbSmnCGiRVpmACpoFSscVW3feDajCvvHuRt0E+4kFvYU=[/tex](5)[tex=4.857x1.143]Qw4nxo2VqcMrdIN2x+hDew==[/tex][img=480x224]17e2dbff5a1fc64.png[/img]