If z 2 – z + 1 = 0, then z n – z –n , where n is a multiple of 3, is

Mathematics · JEE Advanced · NTA Exams — Complex Numbers and Quadratic Equations

1. 2 (–1)ⁿ
2. 0
3. (–1)ⁿ⁺¹
4. None of these

Answer

(B) 0

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