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A.IF X/J=0B.IF X%J=0C.IF INT(X/J)=X/JD.IF INT(X/J)<>X/J
A.IF X/J=0
B.IF X%J=0
C.IF INT(X/J)=X/J
D.IF INT(X/J)<>X/J
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A.IF X/J=0
B.IF X%J=0
C.IF INT(X/J)=X/J
D.IF INT(X/J)<>X/J
A.min=7 at (x,y):(3,1)
B.min=7 at (x,y):(3,3)
C.min=3 at (x,y):(1,3)
D.7 3 3
已知D:|x|+|y|≤1,D1:x≥0,y≥0,x+y≤1,I=(x|+|y|)dσ, J=
(x+y)dσ,则()。
A.I=J
B.I=2J
C.I=3J
D.I=4J
设二维随机变量(X,y)的联合分布律为
P(X=i,Y=j)=c(2i+j),i=0,1,2; j=0,1,求常数p和P{XY=0}的概率。
确定常数λ,使在右半平面x>0内的向量A(x,y)=2xy(x4+y2)λi-x2(x4+y2)λj为某个二元函数u(x,y)的梯度,并求u(x,y).
Private Sub Moveright(x()As Integer)
Dim i As Integer
Dim j As Integer
Dim k As Integer
i=UBound(x)
j=x(i)
For k=i To ______ Step-1
_______
Next k
x(LBound(x))=j
End Sub
Private Sub Command1_Click()
Dim a(10)As Integer
Dim i As Integer
Dim j As Integer
Dim k As Integer
For i=0 To 10
a(i)=i
Next i
j=Val(Text1.Text)
k=0
Do
k=k+1
Call MoveRight(a)
Loop Until k=j
For i=0 To 10
Print a(i);
Next i
End Sub
下列程序的输出结果是 #include<iostream.h> class Myclass{ public:My class(inti=0,int j=0) { x=i; y=j; } void show(){cout<<"x=" <<x<<" " <"y=" <<y<<endl;} void show()const{cout<<"x="<<""<<"y="<<y<<endl;} privated: int x; int y; }; void main() { Myclassmy1(3,4); const my2(7,8); myl.show();my2.show();}
A.x=4,y=3;x=7,y=8
B.x=3,y=4;X=7,y=8
C.x=7,y=8;x=4,y=3
D.x=8,y=7;x=7,y=8
以下程序中函数 f 的功能是在数组 x 的 n 个数 (假定 n 个数互不相同 ) 中找出最大最小数 , 将其中最小
的数与第一个数对换 , 把最大的数与最后一个数对换 . 请填空 .
#include <stdio.h>
viod f(int x[],int n)
{ int p0,p1,i,j,t,m;
i=j=x[0]; p0=p1=0;
for(m=0;m<n;m++)
{ if(x[m]>i) {i=x[m]; p0=m;}
else if(x[m]<j) {j=x[m]; p1=m;}
}
t=x[p0]; x[p0]=x[n-1]; x[n-1]=t;
t=x[p1]; x[p1]= _[14]_______ ; _[15]_______ =t;
}
main()
{ int a[10],u;
for(u=0;u<10;u++) scanf("%d",&a[u]);
f(a,10);
for(u=0;u<10;u++) printf("%d",a[u]);
printf("\n");
}
f:A→B导出的A上的等价关系R定义如下:R={〈x,y〉|x,y∈A且f(x)=f(y)}.设f1,f2,f3,f4∈NN,且
f1(n)=n∈N
f2(n)=1 n为奇数;f2(n)=0,n为偶数
f3(n)=j n=3k+j,j=0,1,2,k∈N
f4(n)=j n=6k+j,j=0,1,…,5,k∈NRi为fi导出的等价关系,i=1,2,3,4.