If alpha is a non-real fifth root of uni...

If alpha is a non-real fifth root of unity, then `3^(|1+alpha+a^(2)+a^(-2)-a^(-1) |)=`

A

`(2n)/(1-alpha)`

B

`n/(1-alpha)`

C

`n/(2(1-alpha))`

D

`(2n)/(alpha-1)`

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The correct Answer is:

A

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