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Let alpha,beta denote the cube roots of ...

Let `alpha,beta` denote the cube roots of unity other then 1 and let `s=underset(n=0)overset(302)sum(-1)^(n)((alpha)/(beta))^(n)` . Then the value of s is -

A

`"either " -2omegaor-2omega^(2)`

B

`"either " -2omegaor2omega^(2)`

C

`"either " 2omegaor-2omega^(2)`

D

`"either " 2omegaor2omega^(2)`

Text Solution

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The correct Answer is:
A
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