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A is a square matrix such that A^(3)=I,...

A is a square matrix such that `A^(3)=I`, then `A^(-1)` is equal to -

A

`A^(2)`

B

A

C

`A^(3)`

D

none of these

Text Solution

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The correct Answer is:
A
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  • If A is a square matrix such that A^(2)=A, then (I+A)^(3)-7A is equal to___

    A
    A
    B
    I-A
    C
    I
    D
    3A

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