If A=[a−115−4] is an involutory matrix, then the value of a is – InterviewSolution

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1.	If A=[a−115−4] is an involutory matrix, then the value of a is
Answer» If $A = [\begin{matrix} a & - 1 15 & - 4 \end{matrix}]$ is an involutory matrix, then the value of $a$ is

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