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1. If $$a^{2} + a+ 1 = 0$$, then the value of $$a^{9}$$ is
(A): 2
(B): 3
(C): 1
(D): 0
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By: anil on 05 May 2019 01.55 am
Expression : $$a^{2} + a+ 1 = 0$$ Multiplying both sides by $$(a-1)$$ , we get : => $$(a-1)(a^2 + a + 1) = 0$$ => $$a^3 - 1 = 0$$ => $$a^3 = 1$$ Cubing both sides => $$a^9 = 1$$
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SSC CGL 2014 Tier 1 27 April shift 8
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MCQ->
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stupid
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set
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mere
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please
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