Question

Find:
[0 1 6 -2/1 0 -5 2/3 3 -1 4/-4 -1 (16) -3]
NOTE: That is a 4x4 matrix above (sorry I can't type it out properly here) with the /'s separating each row.
by carrying a Gauss-Jordan reduction just far enough to make the corresponding matrix triangular. (Remember to allow for the effects of the elementary operations on the determinant).

Answer 1

[ 1 0 -5 2 ] interchanged row 1 and row 2
[ 0 1 6 -2 ]
[ 3 3 -1 4 ]
[-4 -1 16 -3]