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Question

If ω be a complex cube root of unity, then ∣ ∣ ∣1ωω22111110∣ ∣ ∣=

A
1
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B
ω
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C
ω2
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Solution

∣ ∣ ∣1ωω22111110∣ ∣ ∣=12∣ ∣1ωω2112110∣ ∣=12∣ ∣0ωω2012010∣ ∣=0,(Apply C1C1+C2+C3)

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