• 2022-07-25 问题

    应用Matlab软件计算行列式[img=110x88]17da5d7b00219d6.png[/img]为( ). A: x^2 - 6*x^2*y^2 + 8*x*y^3 - 3*y^4 B: x^3 - 6*x^2*y^2 + 8*x*y^3 - 3*y^4 C: x^4 - 6*x^2*y^2 + 8*x*y^3 - 3*y^4 D: x^5- 6*x^2*y^2 + 8*x*y^3 - 3*y^4

    应用Matlab软件计算行列式[img=110x88]17da5d7b00219d6.png[/img]为( ). A: x^2 - 6*x^2*y^2 + 8*x*y^3 - 3*y^4 B: x^3 - 6*x^2*y^2 + 8*x*y^3 - 3*y^4 C: x^4 - 6*x^2*y^2 + 8*x*y^3 - 3*y^4 D: x^5- 6*x^2*y^2 + 8*x*y^3 - 3*y^4

  • 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}

  • 2022-06-16 问题

    执行下列程序段的结果是() int x=3,y=4; printf("x=%d,y=%d",3*x,2*y); A: 3,4 B: x=3,y=4 C: x=9,y=8 D: 9,8

    执行下列程序段的结果是() int x=3,y=4; printf("x=%d,y=%d",3*x,2*y); A: 3,4 B: x=3,y=4 C: x=9,y=8 D: 9,8

  • 2022-05-27 问题

    设 X ~ N(3, 12),Y ~ N(2, 4),且 X,Y 独立,则 X − Y ~ N(1, 8) .

    设 X ~ N(3, 12),Y ~ N(2, 4),且 X,Y 独立,则 X − Y ~ N(1, 8) .

  • 2022-06-06 问题

    若有定义:int x=3, y=4;则表达式x^~y的值为 A: 4 B: -4 C: -7 D: -8

    若有定义:int x=3, y=4;则表达式x^~y的值为 A: 4 B: -4 C: -7 D: -8

  • 2021-04-14 问题

    x+y=8()x-y=4()求x和y各等于几?A.()x=6()y=2()B.()x=5()y=3()C.()x=7()y=1()D.()x=3()y=5

    x+y=8()x-y=4()求x和y各等于几?A.()x=6()y=2()B.()x=5()y=3()C.()x=7()y=1()D.()x=3()y=5

  • 2022-06-12 问题

    如下C程序的输出是什么?#include [stdio.h]void Func1 (int x, int y);void Func2 (int *x, int *y); int main() { int x = 3; int y = 4;Func1 (x, y); printf ("x = %d, y = %d\n", x, y);Func2(&x, &y); printf ("x = %d, y = %d\n", x, y);} void Func1 (int x, int y) { x = x + y; y = x - y; x = x - y; printf ("x = %d, y = %d\n", x, y);} void Func2 (int *x, int *y) { *x = *x + *y; *y = *x - *y; *x = *x - *y;;} A: x = 3, y = 4x = 3, y = 4x = 3, y = 4 B: x = 4, y = 3x = 4, y = 3x = 4, y = 3 C: x = 3, y = 4x = 3, y = 4x = 4, y = 3 D: x = 4, y = 3x = 3, y = 4x = 4, y = 3

    如下C程序的输出是什么?#include [stdio.h]void Func1 (int x, int y);void Func2 (int *x, int *y); int main() { int x = 3; int y = 4;Func1 (x, y); printf ("x = %d, y = %d\n", x, y);Func2(&x, &y); printf ("x = %d, y = %d\n", x, y);} void Func1 (int x, int y) { x = x + y; y = x - y; x = x - y; printf ("x = %d, y = %d\n", x, y);} void Func2 (int *x, int *y) { *x = *x + *y; *y = *x - *y; *x = *x - *y;;} A: x = 3, y = 4x = 3, y = 4x = 3, y = 4 B: x = 4, y = 3x = 4, y = 3x = 4, y = 3 C: x = 3, y = 4x = 3, y = 4x = 4, y = 3 D: x = 4, y = 3x = 3, y = 4x = 4, y = 3

  • 2022-05-27 问题

    执行以下语句的结果为______。 int x=3,y;int*px=&x;y=*px++; A: x=3,y=4 B: x=3,y=3 C: x=4,y=4 D: x=3,y不知

    执行以下语句的结果为______。 int x=3,y;int*px=&x;y=*px++; A: x=3,y=4 B: x=3,y=3 C: x=4,y=4 D: x=3,y不知

  • 2022-06-03 问题

    已知<;2x+2,7>;=<;8,x+y>;,x和y分别是( )。 A: 4 3 B: 4 4 C: 3 4 D: 3 3

    已知<;2x+2,7>;=<;8,x+y>;,x和y分别是( )。 A: 4 3 B: 4 4 C: 3 4 D: 3 3

  • 2022-07-25 问题

    ​设X与Y相互独立,X服从参数为1/2的0-1分布,Y服从参数为3/4的0-1分布,则E(XY)=‌ A: 3/8 B: E(X)E(Y) C: 3/4 D: 1/8 E: E(X) F: 2E(Y)

    ​设X与Y相互独立,X服从参数为1/2的0-1分布,Y服从参数为3/4的0-1分布,则E(XY)=‌ A: 3/8 B: E(X)E(Y) C: 3/4 D: 1/8 E: E(X) F: 2E(Y)

  • 1 2 3 4 5 6 7 8 9 10