Ononot — What is the rank of A = \begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 &

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Linear Systemshard

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What is the rank of $A = \begin{pmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 0 \end{pmatrix}$ ?