设 A 与 B 为 4 阶方阵，alpha, beta, gamma_2, gamma_3, gamma_4 均为 4 维列向量，A = (alpha, gamma_1, gamma_2, gamma_3)，|A| = 2，B = (beta, gamma_1, gamma_2, gamma_3)，|B| = 1，则 |A + B| = ( )。

设三阶矩阵 =(alpha ,gamma 1,(y)_(2)), =(beta ,gamma 1,(gamma )_(2))其中 =(alpha ,gamma

向量 alpha = ((1)/(2) ), beta = ((3)/(2) ), 向量 gamma 满足 2gamma + alpha = 3beta, 那么

1.单选题1.1 若4×4矩阵A=(alpha_(1),gamma_(2),gamma_(3),gamma_(4)),B=(beta_(1),gamma_(2)

设alpha=(3,-1,0,2)^T，beta=(3,1,-1,4)^T，若向量gamma满足2alpha+gamma=3beta，则gamma=().A.

已知alpha_(1),alpha_(2),beta,gamma均为3维列向量，又A=(alpha_(1),alpha_(2),beta)，B=(alpha_(

已知 alpha_1, alpha_2, alpha_3, beta, gamma 均为 4 维列向量，又 A = (alpha_1, alpha_2, alp

[单选题]设α、β、γ都是非零向量，α×β=α×γ，则（）。A . AB . BC . CD . D

3.设三阶方阵A=}alpha2gamma_(1)3gamma_(1),已知|A|=6,|B|=1,则|A-B|=____.3.设三阶方阵$A=\begin{p

(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