Ononot — Let A = \begin{pmatrix} 1 & 2 \\ 0 & 1 \end{pmatrix}. What i

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Eigenvalues & Eigenvectorsmedium

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Let $A = \begin{pmatrix} 1 & 2 \\ 0 & 1 \end{pmatrix}$ . What is the geometric multiplicity of $\lambda = 1$ ?