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Question

If A is a square matrix, then A−A′ is a

A
Diagonal matrix
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B
Skew-symmetric matrix
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C
Symmetric matrix
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D
None of these
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Solution

The correct option is A Skew-symmetric matrix
Given A is square matrix
AAT is which kind of matrix
(AAT)T=AT(AT)T
=ATA
=(AAT)
(AAT)T=(AAT)
AAT is a skew symmetric matrix
Option B is correct

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