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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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