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Question

If A is 3×4 matrix and B is a matrix such that A'B and BA' are both defined. Then B is of the type

A
3×4
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B
3×3
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C
4×4
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D
4×3
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Solution

The correct option is A 3×4
A3×4A4×3Now A'B defined
Bis 3×p
Again B3×pA4×3 defined p=4
B is 3×4.

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