• 2022-06-19
    命令行窗口已经输入>;>; x=3;>;>; y=x^(1/4)+2.15*sin(x)如果需要计算函数y在x=3的值,再继续录入
    A: y
    B: y(3)
    C: y=x^(1/4)+2.15*sin(x)
    D: 以上都可以
  • C

    内容

    • 0

      在图形中添加图例标注的命令是 A: title(x,y,’y=sin(x)’) B: xlabel(x,y,’y=sin(x)’) C: text(x,y,’y=sin(x)’) D: legend(x,y,’y=sin(x)’)

    • 1

      数学表达式的VB算术表达式为() A: Sqr(x*y^3)+Abs(Exp(x)+Sin(x)^3/(x-y)) B: Sqr(x*y^3)+Abs((Exp(x)+Sin(x)^3)/(x-y)) C: Sqr(x*y^3)+Abs(Exp(x)+Sin(x)^3/x-y) D: Sqr((x*y)^3)+Abs((Exp(x)+Sin(x)^3)/(x-y))

    • 2

      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

    • 3

      设矩阵,已知A的特征值是λ1=2,λ2=λ3=1,则()。 A: x=-4,y=3 B: x=-4,y=-3 C: x=4,y=-3 D: x=4,y=3

    • 4

      实验命令“syms x y a, limit(limit(sin(x*y^3)/(x*y^2),x,0),y,a)”的结果为【】. A: 0; B: 1; C: a; D: 无结果.