Complex NumbersHard
Question
If 1, α1, α2, α3, α4 be the roots of x5 - 1 = 0, then find the value of 
(where ω is imaginary cube root of unity.)
(where ω is imaginary cube root of unity.) Options
A.ω
B.ω2
C.1
D.- 1
Solution
(z - 1) (z - α1) .........(z - α4) = z5 - 1
Put z = ω, z = ω2 and divide
=
= (ω + 1)2 = ω4 = ω
Put z = ω, z = ω2 and divide
=
= (ω + 1)2 = ω4 = ωCreate a free account to view solution
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