• 2022-06-12
    立方体尺寸和受力如图[tex=1.786x1.0]D1B2Cgq8PtBET+1p7ztRGA==[/tex]所示,[tex=16.071x1.286]hkICLCX7hfM8cxe8AHA/zgCLu5F+/RBRxqngaySKp37ddwuzuFQ7p0mzYzNPUK48[/tex].试求。三个力分别在[tex=3.5x1.286]f6eRXjGEObz1nyO9aAbMDw==[/tex]轴上的投影:[img=196x177]17d0305d25e8819.png[/img]
  • [tex=23.357x20.929]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[/tex]

    内容

    • 0

      已知随机变量X~B(n,1/2),且P{X=5}=1/32,则n=___________ A: 5 B: 6 C: 7 D: 8

    • 1

      求如图题 8-8 所示结构[tex=1.357x1.214]YnR7qSUKxz+0Bvkd2jgfuQ==[/tex]  的影响线,荷载 P=1 沿 A D F G 移动[img=283x192]179f3ce4c4c5167.png[/img]

    • 2

      设f(x)具有性质:[tex=8.571x1.357]8gPeznjMnng12qtkk9Vgczii1Sh4d1qJxc9iHYT5+YI=[/tex]证明:必有f(0)=0,[tex=5.5x1.357]rt5qCY7TXHcsFUQrD44nPA==[/tex](p为任意正整数)

    • 3

       对 [tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]的不同值,分别求出循环群[tex=1.143x1.214]StMMJ6qThnpokZJIPGrdFyP3vrLnUdltYxmLxjw8za8=[/tex]的所有生成元和所有子群。(1) 7;           (2) 8;               (3)10 ;(4) 14 ;         (5) 15             (6) 18 。

    • 4

      \(二次型f(x)=x^{T}\begin{bmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{bmatrix}x的秩为\)