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If A and B are square matrices of order ...

If A and B are square matrices of order n, then `A - lambda I and B - lambda I` commute for every scalar `lambda` only if a)AB = BA b) AB + BA = 0 c)A = - B d)None of these

A

AB = BA

B

AB + BA = 0

C

A = - B

D

None of these

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The correct Answer is:
A
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