Questions
If is a complex cube root of unity, then a root of the equation is
detailed solution
Correct option is D
Let us denote the given determinant by ∆.Applying C1→C1+C2+C3, we getΔ=x+1+ω+ω2ωω2x+1+ω+ω2x+ω21x+1+ω+ω21x+ω=xωω2xx+ω21x1x+ωClearly ∆=0 for x=0.Similar Questions
If ,then is equal to
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