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If A and B are 3times3 matrices such tha...

If A and B are `3times3` matrices such that AB=A and BA=B, then

A

`A^(2)=A and B^(2)=B`

B

`A^(2)=A and B^(2)=!B`

C

`A^(2)=!A and B^(2)=B`

D

`A^(2)=!A and B^(2)=!B`

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The correct Answer is:
A
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