HU NAN DA XUE JING PIN KE CHENG (2)性质 ()(AB)C=A(BC) (2) )A(B+C)=AB+A C B3)(B+C)A=BA+CA (4)(AB)=(A)B=A(2B)(其中λ为常数) AO 高等粤(1) ( A B ) C = A ( B C ) (2) A (B + C ) = A B + A C (3) ( B + C ) A = B A + C A (4)  ( A B ) = (  A ) B = A (  B ) (其中  为常数) (2) 性质