线性代数总复习2014.12.23.精品课件.矩阵矩阵mn个数构成的m行n列的数表加法:A+B=(aij+bij), A、B是同型矩阵 A + B = B + A, (A + B) + C = A + (B + C), A + O = A, A + ( A) = O,数乘:kA=k(aij) k(lA) = (kl)A, (k + l)A = kA + lA, k(A + B) = kA + kBcij = aikbkj. k=1s矩阵乘法:AB=C,其中C是mn矩阵.(AB)C = A(BC), A(B+C) = AB + AC,(A+B)C = AC+BC,(kA)B = k(AB).矩阵 矩阵矩阵矩阵概念矩阵运算伴随矩阵逆矩阵特殊矩阵矩阵的秩初等变换.精品课件.转置: A=(aij), AT=(aji) 性质:(AT)T = A, (kA)T = kAT, (A+B)T = AT + BT, (AB)T = BTAT.设A = aijn n为方阵, 元素aij的代数余子式为Aij, 则称如下矩阵为方阵A的伴随矩阵. 矩阵 矩阵矩阵矩阵概念矩阵运算伴随矩阵逆矩阵特殊矩阵矩阵的秩初等