[单选题]对x1(n)(0≤n≤N1-1)和x2(n)(0≤n≤N2-1)进行8点的圆周卷积,其中()的结果不等于线性卷积。A . N1=3,N2=4B . N1=5,N2=4C . N1=4,N2=4D . N1=5,N2=5
[单选题]设X~N(μ,σ2),σ已知,xi为样本(i=1,2,…,n)。H0:μ=μ0,H1:μ≠μ0,则检验统计量指的是( )。A.B.C.D.
[问答题]向量组α1=(1,0,1,2),α2=(0,1,2,1),α3=(-2,0,-2,-4),α4=(0,1,0,1),α5=(0,0,0,-1),则向量
[问答题]向量组α1=(1,0,1,2),α2=(0,1,2,1),α3=(-2,0,-2,-4),α4=(0,1,0,1),α5=(0,0,0,-1),则向量
[问答题]向量组α1=(1,0,1,2),α2=(0,1,2,1),α3=(-2,0,-2,-4),α4=(0,1,0,1),α5=(0,0,0,-1),则向量
[单选题]若集合M={0,1,2},N={(x,y)x-2y+1≥0且x-2y-1≤0,x,y∈M},则N中元素的个数为()A . 9B . 6C . 4D . 2
[判断题] (1+(-1)n)/2的极限为0或1A . 正确B . 错误
[单选题]0,1/2 ,0, 1/8 ,0, 1/32 ,0,( )A. 1/120 B. 1/122 C. 1/124 D. 1/128
[单选题]对任何一棵二叉树,若n0,n1,n2分别是度为0,1,2的结点的个数,则n0=(41)。A.n1+1B.n1+n2C.n2+1D.2n1+1
[问答题]设α=(1,0,-1,2),β=(0,1,0,2),则r(αTβ)=--------------.