A . 1
B . 2
C . 4
D . 10
[试题]1,1,3,1,3,5,6,()。A.1;B.2;C.4;D.10;
[试题]1,1,3,1,3,5,6,()。A.1;B.2;C.4;D.10;
[单选题]3,1,4,1,5,9,(),6。A.1B.2C.3D.4
[单选题]设U={1,2,3,4,5,6,7,8},A={3,4,5},B={1,3,6},则集合{2,7,8}是()。A . AB . BC . CD . D
[试题]1,4,3,6,5,()A.4;B.3;C.2;D.7
[问答题]设向量组α1=(1,2,3,4),α2=(2,3,4,5,),α3=(3,4,5,6),α4=(4,5,6,7),则秩(α1,α2,α3,α4)=--
[问答题]设向量组α1=(1,2,3,4),α2=(2,3,4,5,),α3=(3,4,5,6),α4=(4,5,6,7),则秩(α1,α2,α3,α4)=--
[问答题]设向量组α1=(1,2,3,4),α2=(2,3,4,5,),α3=(3,4,5,6),α4=(4,5,6,7),则秩(α1,α2,α3,α4)=--
[单选题]3,-1,5,1,( ),3A.3B.7C.25D.64
[单选题]1£2£«3£4£«5£6£«7£8£«…£«1989£1990£«1991=______。A.895B.896C.995D.996