• 2022-06-06 问题

    Whatistheintersectionpointforthegraphsofthelines<em>y</em>=2<em>x</em>+7and<em>y</em>=3<em>x</em>+2? A: (9,25) B: (5,17) C: (-17,-5) D: (17,-7) E: (-7,17)

    Whatistheintersectionpointforthegraphsofthelines<em>y</em>=2<em>x</em>+7and<em>y</em>=3<em>x</em>+2? A: (9,25) B: (5,17) C: (-17,-5) D: (17,-7) E: (-7,17)

  • 2021-04-14 问题

    若有语句double x=17; int y;,当执行y=(int)(x/5)%2;之后y的值为

    若有语句double x=17; int y;,当执行y=(int)(x/5)%2;之后y的值为

  • 2022-06-17 问题

    3×5, 5×7, 7×11, 11×13, 13×17, ( ) A: 17×23 B: 17×19 C: 17×21 D: 17×25

    3×5, 5×7, 7×11, 11×13, 13×17, ( ) A: 17×23 B: 17×19 C: 17×21 D: 17×25

  • 2022-05-29 问题

    表达式(-17)%5的值表达式(-17)%(-5)的值

    表达式(-17)%5的值表达式(-17)%(-5)的值

  • 2022-05-28 问题

    已知fx等于x的5次方减ax的3次方加bx加2,且f(5)等于17,则f(负5)等于

    已知fx等于x的5次方减ax的3次方加bx加2,且f(5)等于17,则f(负5)等于

  • 2022-06-07 问题

    设随机变量X,Y有E(X)=E(Y)=0,E(X2)=5/8, E(Y2)=17/32, E(XY)=9/16, 则Cov(X,Y)= = ____(a/b)

    设随机变量X,Y有E(X)=E(Y)=0,E(X2)=5/8, E(Y2)=17/32, E(XY)=9/16, 则Cov(X,Y)= = ____(a/b)

  • 2022-10-26 问题

    已知随机变量X,Y的方差D(X)=1,D(Y)=2,且X,Y相互独立,则D(X+2Y)=( ) A: 9 B: 5 C: 17 D: 15

    已知随机变量X,Y的方差D(X)=1,D(Y)=2,且X,Y相互独立,则D(X+2Y)=( ) A: 9 B: 5 C: 17 D: 15

  • 2022-06-07 问题

    求不定积分[img=132x48]17da6537fc8dad6.png[/img]; ( ) A: -(4*(cos(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) B: (4*(sin(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) C: (4*(cos(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) D: (4*(cos(x/2)/2 + 2*cos(x/2)))/(17*exp(2*x))

    求不定积分[img=132x48]17da6537fc8dad6.png[/img]; ( ) A: -(4*(cos(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) B: (4*(sin(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) C: (4*(cos(x/2)/2 + 2*sin(x/2)))/(17*exp(2*x)) D: (4*(cos(x/2)/2 + 2*cos(x/2)))/(17*exp(2*x))

  • 2021-04-14 问题

    在ElGamal签名方案中,设p=17,生成元g=2,私钥x=5,则公钥为 。

    在ElGamal签名方案中,设p=17,生成元g=2,私钥x=5,则公钥为 。

  • 2022-06-01 问题

    求微分方程[img=143x21]17da5f14490e50e.png[/img]的通解,实验命令为(). A: dsolve(D2y-2*Dy+5*y=sin(2*x),x)ans =exp(x)*sin(2*x)*C2+exp(x)*cos(2*x)*C1+1/17*sin(2*x)+4/17*cos(2*x) B: dsolve('D2y-2*Dy+5*y=sin(2*x)','x')ans =cos(2*x)*(sin(4*x)/17 - cos(4*x)/68 + 1/4) - sin(2*x)*(cos(4*x)/17 + sin(4*x)/68) + C1*cos(2*x)*exp(x) - C2*sin(2*x)*exp(x) C: dsolve(D2y-2*Dy+5*y=sin(2*x),'x','y')ans =exp(x)*sin(2*x)*C2+exp(x)*cos(2*x)*C1+1/17*sin(2*x)+4/17*cos(2*x)

    求微分方程[img=143x21]17da5f14490e50e.png[/img]的通解,实验命令为(). A: dsolve(D2y-2*Dy+5*y=sin(2*x),x)ans =exp(x)*sin(2*x)*C2+exp(x)*cos(2*x)*C1+1/17*sin(2*x)+4/17*cos(2*x) B: dsolve('D2y-2*Dy+5*y=sin(2*x)','x')ans =cos(2*x)*(sin(4*x)/17 - cos(4*x)/68 + 1/4) - sin(2*x)*(cos(4*x)/17 + sin(4*x)/68) + C1*cos(2*x)*exp(x) - C2*sin(2*x)*exp(x) C: dsolve(D2y-2*Dy+5*y=sin(2*x),'x','y')ans =exp(x)*sin(2*x)*C2+exp(x)*cos(2*x)*C1+1/17*sin(2*x)+4/17*cos(2*x)

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