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If (1+ x+x^(2) )^(n) =1 + a(1) x+ a(2) x...

If `(1+ x+x^(2) )^(n) =1 + a_(1) x+ a_(2) x^(2) + … + a_(2n) x^(2n)`, then `2a_(1) - 3a_(2) + …- (2n+1) a_(2n)` is equal to

A

`n`

B

`-n`

C

`n+1`

D

`-n-1`

Text Solution

Verified by Experts

The correct Answer is:
B
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