If 1,z1,z2,z3,⋯zn−1 are n roots of unity, then the value of 13−z – InterviewSolution

1.	If 1,z1,z2,z3,⋯zn−1 are n roots of unity, then the value of 13−z1+13−z2+⋯+13−zn−1 is equal to :
Answer» If $1, z_{1}, z_{2}, z_{3}, \dots z_{n - 1}$ are $n$ roots of unity, then the value of $\frac{1}{3 - z_{1}} + \frac{1}{3 - z_{2}} + \dots + \frac{1}{3 - z_{n - 1}}$ is equal to :

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