矩阵A=a11,a12,a13; a21,a22,a23; a31,a32,a33 B=a21,a22,a23; a11,a12,a13;a31+a21,a32+a22,a33+a23

问题描述:

矩阵A=a11,a12,a13; a21,a22,a23; a31,a32,a33 B=a21,a22,a23; a11,a12,a13;a31+a21,a32+a22,a33+a23
P1=0,1,0; 1,0,0; 0,0,1 P2=1,0,0;0,1,0;1,0,1 那么()
A.AP1P2=B B.AP2P1=B
C.P1P2A=B D.P2P1A=B

对矩阵进行行(列)初等变换相当于矩阵左乘(右乘)相应的初等矩阵 选D