• 2022-10-24 问题

    已知x(n)={1, 2, 3},y(n)={1, 2, 1},则x(n)*y(n)=________。(下划线表示n=0) A: {1, 4, 8, 8, 3} B: {1, 4, 8, 8, 3} C: {1, 4, 8, 8, 3} D: {1, 4, 8, 8, 3}

    已知x(n)={1, 2, 3},y(n)={1, 2, 1},则x(n)*y(n)=________。(下划线表示n=0) A: {1, 4, 8, 8, 3} B: {1, 4, 8, 8, 3} C: {1, 4, 8, 8, 3} D: {1, 4, 8, 8, 3}

  • 2022-05-31 问题

    ‏ y = [1, 2, 3, 4],y=y+[8] ,则y的取值不正确的是‏ A: [1, 2, 3, 4, 8] B: [8,1, 2, 3, 4,] C: [1, 2, 3, 8, 4] D: [1, 2, 8, 4,3]

    ‏ y = [1, 2, 3, 4],y=y+[8] ,则y的取值不正确的是‏ A: [1, 2, 3, 4, 8] B: [8,1, 2, 3, 4,] C: [1, 2, 3, 8, 4] D: [1, 2, 8, 4,3]

  • 2021-04-14 问题

    已知点()(()-()1(),()y()1())(),()(2(),()y()2())(),()(()-()3(),()y()3())()都在函数()y()=()x()2()的图象上,则()()A.()y()1()<()y()2()<()y()3()B.()y()1()<()y()3()<()y()2()C.()y()3()<()y()2()<()y()1()D.()y()2()<()y()1()<()y()3

    已知点()(()-()1(),()y()1())(),()(2(),()y()2())(),()(()-()3(),()y()3())()都在函数()y()=()x()2()的图象上,则()()A.()y()1()<()y()2()<()y()3()B.()y()1()<()y()3()<()y()2()C.()y()3()<()y()2()<()y()1()D.()y()2()<()y()1()<()y()3

  • 2022-06-15 问题

    x = 2,y = 3, x | y的值为 A: 3 B: 2 C: 1 D: 8

    x = 2,y = 3, x | y的值为 A: 3 B: 2 C: 1 D: 8

  • 2022-06-06 问题

    MATLAB 命令 data=&#91;1 4 2 4 4 1 2 3 1 3&#93;; y=hist(data,4),其结果为 A: y=4 1 2 3 B: y=3 2 2 3 C: y=3 2 3 2 D: y=4 2 1 1

    MATLAB 命令 data=&#91;1 4 2 4 4 1 2 3 1 3&#93;; y=hist(data,4),其结果为 A: y=4 1 2 3 B: y=3 2 2 3 C: y=3 2 3 2 D: y=4 2 1 1

  • 2021-04-14 问题

    设随机变量(X,Y)的联合密度函数为p(x,y)=k(6-x-y),0 (1) 1/8 (2) 3/8

    设随机变量(X,Y)的联合密度函数为p(x,y)=k(6-x-y),0 (1) 1/8 (2) 3/8

  • 2021-04-14 问题

    【单选题】rev(c(1,3,2,6,7,8,8,1,1,0))的运行结果 ? A. [1] 0 1 1 1 2 3 6 7 8 8 B. [1] 1 3 2 6 7 8 8 1 1 0 C. [1] 0 1 1 8 8 7 6 2 3 1 D. [1] 8 8 7 6 3 2 1 1 1 0

    【单选题】rev(c(1,3,2,6,7,8,8,1,1,0))的运行结果 ? A. [1] 0 1 1 1 2 3 6 7 8 8 B. [1] 1 3 2 6 7 8 8 1 1 0 C. [1] 0 1 1 8 8 7 6 2 3 1 D. [1] 8 8 7 6 3 2 1 1 1 0

  • 2021-04-14 问题

    Dimension a[8] A[1]=2 A[2]=a[1]+4 A[3]=a[1]+a[2] ?a[1],a[2],a[3]

    Dimension a[8] A[1]=2 A[2]=a[1]+4 A[3]=a[1]+a[2] ?a[1],a[2],a[3]

  • 2022-06-12 问题

    intx=5,y=8,z=7;表达式z=!(x>y)||(x=1,y=3)计算后的结果 A: x=1,y=3,z=1 B: x=1,y=3,z=0 C: x=5,y=8,z=0 D: x=5,y=8,z=1

    intx=5,y=8,z=7;表达式z=!(x>y)||(x=1,y=3)计算后的结果 A: x=1,y=3,z=1 B: x=1,y=3,z=0 C: x=5,y=8,z=0 D: x=5,y=8,z=1

  • 2022-06-07 问题

    设A={1, 2, 3},B={1, 2, 3, 4},A到B的关系R={〈x, y〉|x=y},则R为 ( ) A: {<1, 2>, <2, 3>} B: {<1, 1>, <1, 2>, <1, 3>, <1, 4>, <1, 5>} C: {<1, 1>, <2, 1>} D: {<1, 1>, <2, 2>, <3, 3 >}

    设A={1, 2, 3},B={1, 2, 3, 4},A到B的关系R={〈x, y〉|x=y},则R为 ( ) A: {<1, 2>, <2, 3>} B: {<1, 1>, <1, 2>, <1, 3>, <1, 4>, <1, 5>} C: {<1, 1>, <2, 1>} D: {<1, 1>, <2, 2>, <3, 3 >}

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