初等变换求逆矩阵1 1 -1;0 2 3;1 -1 0;
问题描述:
初等变换求逆矩阵1 1 -1;0 2 3;1 -1 0;
答
(A,E)=1 1 -1 1 0 00 2 3 0 1 01 -1 0 0 0 1r3-r11 1 -1 1 0 00 2 3 0 1 00 -2 1 -1 0 1r3+r21 1 -1 1 0 00 2 3 0 1 00 0 4 -1 1 1r3*(1/4),r1+r3,r2-3r31 1 0 3/4 1/4 1/40 2 0 3/4 1/4 -3/40 0 1 -1/4 1/4 1/4r2*(...