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),gamma_(3),gamma_(4))其中|alpha,beta,gamma_(1),gamma_(2),gamma_(3),gamma_(4) 均为4维列向量，且已知行列式det(A)=4, det(B)=1则行列式det(A+B)=（）

20 ℃，表面张力大小关系为：gamma_({Hg)} > gamma_({H2O)} > gamma_({CCL4)}。A. 对B. 错

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, gam

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

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_(

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

(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

单选题-|||-令 =((alpha )_(1),(alpha )_(2),beta ) =((alpha )_(1),(alpha )_(2),gamma )

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