HU NAN DA XUE JING PIN KE CHENG (2)性质 设A、B为m×n矩阵,A、v为常数 (1)(Al)A=x(lA)=u(2A); (2)(A+B)=元A+B (3)(+u)A=A+uA (4)1A=A (-1)A=-A AO 高等粤设 A、B 为 m × n 矩阵，、u为常数 (1) (  u ) A =  ( u A) = u (  A ); (2)  ( A + B ) =  A +  B (3) (  + u ) A =  A + u A (4) 1·A = A (－1)·A = －A (2) 性质