A=[1−1121−3111],10B=[422−50α1−23] and BA = \begin{bmatrix} 1 & -1 & 1 \\ 2 & 1 & -3 \\ 1 & 1 & 1 \end{bmatrix}, 10B = \begin{bmatrix} 4 & 2 & 2 \\ -5 & 0 & \alpha \\ 1 & -2 & 3 \end{bmatrix} \text{ and } B…

Mathematics

Problem

A=[1−1121−3111],10B=[422−50α1−23] and BA = \begin{bmatrix} 1 & -1 & 1 \\ 2 & 1 & -3 \\ 1 & 1 & 1 \end{bmatrix}, 10B = \begin{bmatrix} 4 & 2 & 2 \\ -5 & 0 & \alpha \\ 1 & -2 & 3 \end{bmatrix} \text{ and } B is the inverse of AA, then the value of α\alpha is (a) 2 (b) 0 (c) 5 (d) 4 (2007)

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