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If Z is an idempotent matrix, then (I+Z)...

If Z is an idempotent matrix, then `(I+Z)^(n)`

A

`I+2^(n)Z`

B

`I+(2^(n)-1)Z`

C

`I-(2^(n)-1)Z`

D

None of these

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The correct Answer is:
B
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