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Kunze Linear Algebra
· Problem 1.6.5
Systems of Linear Equations
Mathematics — Methods · matrix-invertibility
Problem
Discover whether
A
=
[
1
2
3
4
0
2
3
4
0
0
3
4
0
0
0
4
]
A = \begin{bmatrix} 1 & 2 & 3 & 4 \\ 0 & 2 & 3 & 4 \\ 0 & 0 & 3 & 4 \\ 0 & 0 & 0 & 4 \end{bmatrix}
A
=
1
0
0
0
2
2
0
0
3
3
3
0
4
4
4
4
is invertible, and find
A
−
1
A^{-1}
A
−
1
if it exists.
Related theory
S Matrix And T Matrix
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