用初等变换法求方针的逆矩阵1 0 12 1 0-3 2 5
问题描述:
用初等变换法求方针的逆矩阵
1 0 1
2 1 0
-3 2 5
答
(A,E)=1 0 1 1 0 02 1 0 0 1 0-3 2 5 0 0 1r3-5r11 0 1 1 0 02 1 0 0 1 0-8 2 0 -5 0 1r3-2r21 0 1 1 0 02 1 0 0 1 0-12 0 0 -5 -2 1r3*(-1/12),r1-r3,r2-2r30 0 1 7/12 -1/6 1/120 1 0 -5/6 2/3 1/61 0 0 5/12 1/6 ...