Mark the tick against the correct answer in the following: If ω is a complex root of unity then

Question

Philoid · Accepted Answer

To find: Value of

Formula used: = 1

We have,

On expanding the above along 1^st column

⇒ 1 - +

⇒

⇒ … (i)

As = 1,

⇒

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

⇒

⇒ 1 – 1 = 0