Ononot — What is the rank of A = \begin{pmatrix} 1 & 2 & 3 \\ 2 & 4 &

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Matriceshard

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What is the rank of $A = \begin{pmatrix} 1 & 2 & 3 \\ 2 & 4 & 6 \\ 3 & 6 & 9 \end{pmatrix}$ ?