Q. 54.2( 6 Votes )

Mark the tick against the correct answer in the following:

If ω is a complex root of unity then

A. 1

B. -1

C. 0

D. none of these

Answer :

To find: Value of


Formula used: = 1


We have,


On expanding the above along 1st column


1 - +



… (i)


As = 1,




Using the above obtained value of in eqn. (i)





1 – 1 = 0

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