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Let A=[[1,0,0],[0,alpha,beta],[0,beta,al...

Let `A=[[1,0,0],[0,alpha,beta],[0,beta,alpha]]` and `abs(2A^(3))=2^(21)` where `alpha,beta in Z` ,Then the value of `alpha` is

A

3

B

9

C

5

D

17

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