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If A,B,A + I,A + B are idempotent matric...

If A,B,A + I,A + B are idempotent matrics, then a)AB + BA = O b)AB = BA c)A + B = O d)None of these

A

AB + BA = O

B

AB = BA

C

A + B = O

D

None of these

Text Solution

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The correct Answer is:
A
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