Ononot — Reduce the matrix A = \begin{pmatrix} 2 & 4 & 6 & 8 \\ 1 & 3

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Matriceshard

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Reduce the matrix $A = \begin{pmatrix} 2 & 4 & 6 & 8 \\ 1 & 3 & 2 & 4 \\ 1 & 2 & 4 & 4 \end{pmatrix}$ to row echelon form. What is its rank?