Given 1, ω and ω2 are the cube roots of unity.
1+ω+ω2 = 0
1+ω = -ω2
1+ω2 = -ω
(1+ω)(1+ ω2)(1+ω4)(1+ω8) = (1+ω)(-ω)(1+ω)(1+ω2)
= (1+ω)2(-ω-ω3)
= (1+ω)2(-ω-1)
= (-ω2)2(ω2)
= ω6
= 1
Hence option (1) is the answer.
Given 1, ω and ω2 are the cube roots of unity.
1+ω+ω2 = 0
1+ω = -ω2
1+ω2 = -ω
(1+ω)(1+ ω2)(1+ω4)(1+ω8) = (1+ω)(-ω)(1+ω)(1+ω2)
= (1+ω)2(-ω-ω3)
= (1+ω)2(-ω-1)
= (-ω2)2(ω2)
= ω6
= 1
Hence option (1) is the answer.