函数矩阵的导数运算有下列性质: (1)A(x)是常数矩阵的充分必要条件是 d4(x) 0 dx (2)A(x=(a, (xmm, B(x)=(6, (x)) 均可导,则 [A(x)+B(x)]= da(x) dB(x)函数矩阵的导数运算有下列性质： (1) 是常数矩阵的充分必要条件是 (2) 设 均可导，则 A x( ) d ( ) 0 d A x x = ( ) ( ( )) , ( ) ( ( )) A x a x B x b x = = ij m n ij m n   d d ( ) d ( ) [ ( ) ( )] d d d A x B x A x B x x x x + = +