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Linear AlgebraMediumRow Reduction & Rank

Row Reduction & Rank · Medium problem

What is the rank of M=(210−602−7−943018−1824)M = \begin{pmatrix}2 & 10 & -6 & 0 \\ 2 & -7 & -9 & 4 \\ 30 & 18 & -18 & 24\end{pmatrix}?