6.1 No computador
A inversão e a transposição também estão definidas no Octave:
octave:1> A=[2,3;-1,-1] A = 2 3 -1 -1 octave:2> inv(A) ans = -1 -3 1 2 octave:3> B=[1,2;2,4] B = 1 2 2 4 octave:4> inv(B) warning: matrix singular to machine precision ans = Inf Inf Inf Inf octave:5> C=[2,4,-3,3,-9;0,-2,1,-1,3;2,2,-2,1,5;0,0,0,0,1] C = 2 4 -3 3 -9 0 -2 1 -1 3 2 2 -2 1 5 0 0 0 0 1 octave:6> C' ans = 2 0 2 0 4 -2 2 0 -3 1 -2 0 3 -1 1 0 -9 3 5 1