Ononot — For a matrix A = \begin{pmatrix} 2 & 1 & 0 \\ 0 & 2 & 1 \\ 0

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Eigenvalues & Eigenvectorseasy

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For a matrix $A = \begin{pmatrix} 2 & 1 & 0 \\ 0 & 2 & 1 \\ 0 & 0 & 2 \end{pmatrix}$ , compute the sum of its eigenvalues.