If n is a positive integer but not a mul...

If n is a positive integer but not a multiple of 3 and `z = -1 + i sqrt( 3) ` then `(z^(2n) + 2^(n)z^(n) + 2^(2n))` is equal to :

A

`2^(2n)`

B

`0`

C

`3. 2^(4n)`

D

None of these

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The correct Answer is:

B, C

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