2.性质 设A、B为mXn矩阵,、H为常数 (1)(p)A=2(uA)=(A) (2)n(A+B)=nA+nB (3)(x+)A=A+1A (4)1A=A (-1)A=-A2. 性质 设 A、B 为 m × n 矩阵，、 μ 为常数 (1) (  μ ) A =  (μ A) = μ (  A ); (2)  ( A + B ) =  A +  B (3) (  + μ ) A =  A + μ A (4) 1·A = A (－1)·A = －A