Ch-3.3-ex-5-Revised-김준하

2142 days ago by matrix

A=matrix(QQ,4,4,[4,1,3,-2,6,-3,4,9,8,4,1,5,-1,2,1,7]) I=identity_matrix(4) A.augment(I).echelon_form() 
        
[        1         0         0         0   -30/781    28/781    79/781 
-101/781]
[        0         1         0         0  151/1562 -193/1562   97/1562  
111/781]
[        0         0         1         0  471/1562   29/1562 -225/1562  
129/781]
[        0         0         0         1 -119/1562   59/1562   27/1562  
47/781]
[        1         0         0         0   -30/781    28/781    79/781  -101/781]
[        0         1         0         0  151/1562 -193/1562   97/1562   111/781]
[        0         0         1         0  471/1562   29/1562 -225/1562   129/781]
[        0         0         0         1 -119/1562   59/1562   27/1562    47/781]