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The inverse of the matrix $\begin {bmatrix} 7 & -3 & -3 \\ -1 & 1 & 0 \\ -1 & 0 & 1 \end{bmatrix} $ is :

\[\begin {array} {1 1} (1)\;\begin {bmatrix} 1 & 1 & 1 \\ 3 & 4 & 3 \\ 3 & 3 & 4 \end{bmatrix} & \quad (2)\;\begin {bmatrix} 1 & 3 & 1 \\ 4 & 3 & 8 \\ 3 & 4 & 1 \end{bmatrix} \\ (3)\;\begin {bmatrix} 1 & 1 & 1 \\ 3 & 3 & 4 \\ 3 & 4 & 3 \end{bmatrix} & \quad (4)\;\begin {bmatrix} 1 & 3 & 3 \\ 1 & 4 & 3 \\ 1 & 3 & 4 \end{bmatrix} \end {array}\]

1 Answer

$(4)\;\begin {bmatrix} 1 & 3 & 3 \\ 1 & 4 &  3 \\ 1 & 3 & 4 \end{bmatrix}$
answered Nov 7, 2013 by pady_1
edited Jan 20, 2014 by meena.p
 

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