Ononot — Let A be a 5 \times 4 matrix with rank(A) = 3, and let B be

Linear Systemshard

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Let $A$ be a $5 \times 4$ matrix with rank $(A) = 3$ , and let $B$ be a $4 \times 6$ matrix with rank $(B) = 4$ . Which statement about rank $(AB)$ is always true?