If A is a matrix of order $m \times n$ and B is a matrix such that $AB'$ and $B'A$ are both defined, the order of the matrix B is - DASH

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Question

If A is a matrix of order $m \times n$ and B is a matrix such that $AB'$ and $B'A$ are both defined, the order of the matrix B is

$m \times m$

$n \times n$

$n \times m$

$m \times n$

Solution

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