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Linear AlgebraMediumRow Reduction & Rank

Row Reduction & Rank · Medium problem

What is the rank of M=(0−4120−64−1240−130)M = \begin{pmatrix}0 & -4 & 12 & 0 \\ -6 & 4 & -12 & 4 \\ 0 & -1 & 3 & 0\end{pmatrix}?