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If A is 3 xx 4 matrix and B is a matrix ...

If A is `3 xx 4` matrix and B is a matrix such that `A^(1)B` and `B A^(1)` are both defined, then B is of the type

A

`3xx 4`

B

`3xx 3`

C

`4xx 4`

D

`4xx 3`

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A
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