2、矩阵乘法的运算规律 (I)(AB)C=A(BC)方 (2)A(B+C)=AB+AC,(B+C)A=BA+CA (3)(AB)=(24)B=A(B)(其中元为数); (4)AE=EA=A; (⑤)若A是n阶矩阵,则A为A的k次幂,即 A=AA1并且A产41,_ 个 (m,k为正整数) 2、矩阵乘法的运算规律 (1)(AB)C = A(BC); (2) A(B + C) = AB + AC, (B + C)A = BA+ CA; (3) (AB) = (A)B = A(B) (其中 为数); (4) AE = EA = A; 若A是 阶矩阵,则 为A的 次幂,即 并且 (5) n k A k k个 k A = A A A A A A , m k m+k = ( ) . mk m k A = A (m,k为正整数)