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inverse (
1
2
3
4
5
6
7
8
9
)
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Solution
Matrixissingular
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Solve by:
One step at a time
(
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)−1
Inverse matrix
A matrix is invertible if and only if there is a sequence of elementary row (or column) operations taking it to the identity matrix.
Augment with a 3x3identity matrix
[
1
2
3
∣
1
0
0
4
5
6
∣
0
1
0
7
8
9
∣
0
0
1
]
Reduce the matrix on the left to the identity matrix