- Thread starter
- #1

1 3 1 1

2 5 2 2

1 3 8 9

1 3 2 2

it seems less time efficient to find the inverse using this method. Is it possible to reduce the matrix to a a simpler yet equal form and still come out with the same cofactor matrix?

- Thread starter delgeezee
- Start date

- Thread starter
- #1

1 3 1 1

2 5 2 2

1 3 8 9

1 3 2 2

it seems less time efficient to find the inverse using this method. Is it possible to reduce the matrix to a a simpler yet equal form and still come out with the same cofactor matrix?

- Moderator
- #2

- Feb 7, 2012

- 2,705

Even for a 3x3 matrix, the adjoint method is a very laborious way to find the inverse. For anything larger than that, it rapidly gets far worse. Maybe the purpose of this exercise in the homework book is to get you to see how bad the adjoint method is, so that you will appreciate the value of having other methods.

1 3 1 1

2 5 2 2

1 3 8 9

1 3 2 2

it seems less time efficient to find the inverse using this method. Is it possible to reduce the matrix to a a simpler yet equal form and still come out with the same cofactor matrix?

- Admin
- #3

- Jan 26, 2012

- 4,043