If Z is an idempotent matrix, then \[{{(I+Z)}^{n}}\]

1.	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
Answer» C. \[I-({{2}^{n}}-1)Z\]

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If Z is an idempotent matrix, then \[{{(I+Z)}^{n}}\]

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