向量组(alpha )_(1)=(1,-1,5,-1)，(alpha )_(1)=(1,-1,5,-1)，(alpha )_(1)=(1,-1,5,-1)，(alpha )_(1)=(1,-1,5,-1)的秩为( )，一个极大无关组为（ ），把不属于极大无关组的其余向量用该极大无关组线性表示为（ ）。A.(alpha )_(1)=(1,-1,5,-1)B.(alpha )_(1)=(1,-1,5,-1)C.(alpha )_(1)=(1,-1,5,-1)D.(alpha )_(1)=(1,-1,5,-1)

8.求向量组 alpha_(1)=(1,-1,5,-1)^T, alpha_(2)=(1,1,-2,3)^T, alpha_(3)=(3,-1,8,1)^T,

设sim U(1,5)，则二次方程sim U(1,5)有实根的概率为______sim U(1,5)sim U(1,5)sim U(1,5)sim U(1,5)

5、设有向量组 (alpha )_(1)=((1,1,2,3))^T , (alpha )_(2)=((1,-1,1,1))^T , (alpha )_(3)=

4.求向量组alpha_(1)=(1,1,2,3),alpha_(2)=(1,-1,1,1),alpha_(3)=(1,3,3,5),alpha_(4)=(4,

向量组 (alpha )_(1)=(1,1,1,1)，(alpha )_(1)=(1,1,1,1)(alpha )_(1)=(1,1,1,1)，(alpha )

设向量组(alpha )_(1)=((1,0,1))^T，(alpha )_(1)=((1,0,1))^T，(alpha )_(1)=((1,0,1))^T不能

若向量组(alpha )_(1)=((1,1,1))^T (alpha )_(2)=((0,1,1))^T (alpha )_(3)=((0,0,1))^T能由

2.求向量组: (alpha )_(1)=((1,1,3,1))^T (alpha )_(2)=((-1,1,-1,3))^T, (alpha )_(3)=((

已知 (alpha )_(1)=(1,2,-3), (alpha )_(2)=(2,-1,-1),(alpha )_(1)=(1,2,-3), (alpha )

设向量组 (alpha )_(1)=((0,1,1))^T, (alpha )_(2)=((1,0,1))^T (alpha )_(3)=((2,1,0))^T