2)αi,αz,",αβ,β2,",β为V中的两组向量,矩阵 A,Be pmn,则(α1,α2,".,αn)A)B = (α1,α2,"",αn)(AB);(αj,α2,"",αn)A+ (αj,α2,"",αn)B=(αi,α2,..,αn)(A+ B);(α1,α2,*,αn)A+(β,β2,..,β.)A=(α, +βr,α, + β2,"",αn + βn)A :若αj,αz,…,α,线性无关,则(α1,α2,"*-,αn)A= (α1,α2,",αn)B A = B.86.4基变换与坐标变换A§6.4 基变换与坐标变换 2) 1 2 , , , n ; 1 2 , , , n 为V中的两组向量, 矩阵 , ,则 n n A B P 1 2 1 2 (( , , , ) ) ( , , , )( ) n n A B AB = ; 1 2 1 2 ( , , , ) ( , , , ) n n A B + ; 1 2 1 2 ( , , , ) ( , , , ) n n A A + ; 1 1 2 2 ( , , , ) = + + + n n A 若 1 2 , , , n 线性无关,则 1 2 1 2 ( , , , ) ( , , , ) . n n A B A B = = 1 2 ( , , , )( ) = + n A B