If w is the cubic root of the unit and n, a multiple of 3, then 1 + wn +2wn is

If w is the cubic root of the unit and n, a multiple of 3,
then 1 + wn +2wn is equal to

(1) 3

(2) 2

(3) 1

(4) 0

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If w is the cubic root of the unit and n, a multiple of 3, then 1 + wn +2wn is equal to (1) 3 ..

Answer / ali

( 1 ) 3

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