Question

Using elementary transformations, determine matrices B and C so that BAC=I for the matrix A. Use...

Using elementary transformations, determine matrices B and C so that BAC=I for the matrix A. Use B and C to compute the inverse of A; that is, take the inverse of both sides of the equation BAC=I and then solve for A inverse.

I need to find Matrix B, Matrix C, and Inverse of matrix A

A=

1   2   1   1

0   1   2   0

1   2   2   1

0   -1 1   2

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