Let \( A=\left[\begin{array}{ccc}1 & -1 & 1 \\ 2 & 1 & -3 \\ 1 & 1 & 1\end{array}\right] \) and ...
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0Let \( A=\left[\begin{array}{ccc}1 & -1 & 1 \\ 2 & 1 & -3 \\ 1 & 1 & 1\end{array}\right] \) and \( \mathrm{kB}=\left[\begin{array}{ccc}4 & 2 & 2 \\ -5 & 0 & \alpha \\ 1 & -2 & 3\end{array}\right] \)
P
W where \( k, \alpha \in N \). If \( B \) is the inverse of the matrix \( A \), then the value of \( \mathrm{k}+\alpha \) equals
(1) 10
(2) 15
(3) 5
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