• 2022-06-03
    已知序列[img=166x98]18034e568823a5a.png[/img],[img=186x98]18034e56992b59f.png[/img],则[img=116x34]18034e56a4b2910.png[/img]12点的圆周卷积为 ( )。
    A: {-2,0,2,3,4,4,2,0,-2,3,-4,-3}
    B: {-2,0,2,3,4,4,2,0,-2,-4,-4,-3}
    C: {-2,0,3,3,4,4,2,0,-2,-4,-4,-2}
    D: {-1,0,2,3,4,4,2,0,-2,-4,-4,-3}
  • B

    内容

    • 0

      求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4

    • 1

      下面变量中哪一个可以表示2*3的二维列表? A: A = [[1, 2, 0],[3, -1, 4]] B: A = [[1, 2],[3, 4], [0, 8]] C: A = [[1, 2, 0] [3, -1, 4]] D: A = {[1, 2, 0],[3, -1, 4]}

    • 2

      range(5)表示的范围是_________。 A: [0, 1, 2, 3] B: [1, 2, 3, 4] C: [0, 1, 2, 3, 4] D: [1, 2, 3, 4, 5]

    • 3

      下列各数中积为正的是(). A: 2×3×5×(-4) B: 2×(-3)×(-4)×(-3) C: (-2)×0×(-4)×(-5) D: (-2)×(-3)×(-4)×(-5)

    • 4

      【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]