2. 已知3阶方阵A,B满足3A+B=0且|A|=2,则|B|=_____________.
2. 已知3阶方阵A,B满足3A+B=0且|A|=2,则|B|=_____________.
已知四阶方阵A满足|A-E|=0,方阵B=A^3-3A^2,满足BB^T=2E,且|B|
设3阶方阵 A与B满足 (A^-1)B=2B+A^-1,求B
设3阶方阵A=(a1,b,r) ,3阶方阵B=(a2,b,r) ,且|A|=2,|B|=-1 求|A+B|=
已知向量a,b满足|a|=2,|b|=3,且(a-2b)(2a+b)=-1,则a与b的夹角为?
设n阶方阵 A B 满足AB=BA ,(A+B)^3=0,且B可逆,证明A 可逆.
已知方阵A满足aA^2 + bA + cE = 0 (a,b,c为常数,且c≠0),则A^(-1) = ?
设A为3阶方阵,B为4阶方阵,且行列式|A|=1,|B|=-2,则行列式||B|A|之值为( ) A.-8 B.-2 C
(1)已知n阶矩阵A满足A^3=3A(A-I),求(A-I)^-1;(2)n阶方阵A,B满足A+B=AB,求(A-I)^
设n阶方阵A,B满足A*BA=4BA-2E且|A|=2,|E-2A|≠0,求矩阵B
设A,B为n阶方阵,已知|A|=-3,|B|=2,则|2A^(-1)B*+A*B^(-1)|=
已知实数a,b满足a^2-3a+1=0,b^2-3b+1=0,且a≠b,则b/a+a/b的值为