A. $\beta=(1,0,0)^{T}$
B. $\beta=(1,2,-2)^{T}$
C. $\beta=(1,1,-2)^{T}$
D. $\beta=(1,1,1)^{T}$
7.设alpha_(1),alpha_(2),alpha_(3),beta_(1),beta_(2)均为4维列向量，矩阵A=(alpha_(1),alpha_(
已知alpha_(1),alpha_(2),beta,gamma均为3维列向量，又A=(alpha_(1),alpha_(2),beta)，B=(alpha_(
4.(判断题) 向量组满足 beta_(1)=alpha_(1), beta_(2)=alpha_(1)+alpha_(2), beta_(3)=alpha_(
(6)已知alpha_(1),alpha_(2),alpha_(3),beta,gamma均为四维列向量，又A=[alpha_(1),alpha_(2),alp
(6)已知alpha_(1),alpha_(2),alpha_(3),beta,gamma均为四维列向量，又A=[alpha_(1),alpha_(2),alp
设alpha_(1),alpha_(2),alpha_(3),alpha_(4)线性无关，且alpha_(1),alpha_(2),alpha_(3),alph
设alpha_(1),alpha_(2),alpha_(3),alpha_(4)线性无关，且alpha_(1),alpha_(2),alpha_(3),alph
3.判断题设向量beta可由向量组alpha_(1),alpha_(2),alpha_(3),alpha_(4)线性表示，但不能由alpha_(1),alpha
已知向量组alpha_(1),alpha_(2),alpha_(3)线性无关，若alpha_(1)+alpha_(2),alpha_(2)+alpha_(3),
4.设向量组beta_(1)=alpha_(1)+2alpha_(2)-alpha_(3),beta_(2)=alpha_(1)+2alpha_(2)+2alp