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If i=sqrt(-1), omega is a non real cube...

If `i=sqrt(-1), omega` is a non real cube root of unity then `((1+i)^(2 n)-(1-i)^(2 n))/((1+omega-omega^(2))(1-omega+omega^(2)))=`

A

0 if n is even

B

0 for all n in `bar(z)`

C

`2^(n-1)` for all n in z

D

none of these

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The correct Answer is:
A
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