If z² + z + 1 = 0, z ∈ ℂ then..... | JEE Main 2022 | Complex

JEE MAIN 2022

26-06-22 S2

Question

If $z^2+z+1=0, z \in \mathbb{C}$, then $\left|\sum_{n=1}^{15}\left(z^n+(-1)^n \frac{1}{z^n}\right)^2\right|$ is equal to

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Question Tags

JEE Main

Mathematics

Medium

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