Multiple Choice Questions

If a2 a 1 0 then the value of a9 is ........

Quantitative Aptitude (Pb Patwari) Algebra

If a² + a + 1 = 0, then the value of a⁹ is

a² + a + 1 = 0
Both sides multiplied by (a – 1)
⇒ (a – 1)(a² + a + 1) = 0
⇒ a³ – 1 = 0
⇒ a = 1
∴ a⁹ = 1

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