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A square matrix A is used to be an idemp...

A square matrix A is used to be an idempotent matrix if `A^(2) = A`.
If A is an idempotent matrix and B = I -A, then-

A

AB = 0

B

BA`ne`0

C

`B^(2)` = I

D

`AB = I_(n)`

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The correct Answer is:
A
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