If [1a1]⎡⎢⎣2aa2⎤⎥⎦=[1], then the value of a is (a) 1 – InterviewSolution

1.	If [1a1]⎡⎢⎣2aa2⎤⎥⎦=[1], then the value of a is (a) 1 (b) −1 (c) 2 (d) −2
Answer» If $[\begin{matrix} 1 & a & 1 \end{matrix}] ⎡ ⎢ ⎣ \begin{matrix} 2 a a 2 \end{matrix} ⎤ ⎥ ⎦ = [\begin{matrix} 1 \end{matrix}]$ , then the value of $a$ is $(a) 1 (b) - 1$ $(c) 2 (d) - 2$

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