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If A is a square matrix such that A^(2)=...

If A is a square matrix such that `A^(2)=I` then `(A-I)^(3)+(A+I)^(3)-7A` is equal to …….

A

A

B

`I-A`

C

`I+A`

D

3A

Text Solution

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The correct Answer is:
A
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