Ononot — Find the rank of \begin{pmatrix} 1 & 0 & 0 \\ 0 & 5 & 0 \\ 0

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Linear Systemshard

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Find the rank of $\begin{pmatrix} 1 & 0 & 0 \\ 0 & 5 & 0 \\ 0 & 0 & 0 \end{pmatrix}$ .