Higher Secondary Question Paper Solution of Year 2017 Question No: A.2.(b)(i)

\(A = \begin{pmatrix} 2 & -1 \\[0.3em] 1 & 3 \\[0.3em] \end{pmatrix}\)হলে দেখাও যে, \(A^2 - 5A + 7I_2 = 0 \) অতঃপর \(A^{-1}\) নির্ণয় করো |

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