Let A=⎡⎢⎣1−1121−3111⎤⎥⎦ and 10B=⎡⎢⎣422−50a1− – InterviewSolution

1.	Let A=⎡⎢⎣1−1121−3111⎤⎥⎦ and 10B=⎡⎢⎣422−50a1−23⎤⎥⎦. If B is the inverse of A, then the value a is:
Answer» Let $A = ⎡ ⎢ ⎣ \begin{matrix} 1 & - 1 & 1 2 & 1 & - 3 1 & 1 & 1 \end{matrix} ⎤ ⎥ ⎦$ and $10 B = ⎡ ⎢ ⎣ \begin{matrix} 4 & 2 & 2 - 5 & 0 & a 1 & - 2 & 3 \end{matrix} ⎤ ⎥ ⎦ .$ If $B$ is the inverse of $A$ , then the value $a$ is:

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