Find a^2 + 1 / a^2 , a^3 + 1 / a^3 and a^4 + 1/a^4 if a + 1/a = 3
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An axiom, postulate or assumption is a statement that is taken to be true, to serve as a premise or starting point for further reasoning and arguments. The word comes from the Greek axíōma 'that which is thought worthy or fit' or 'that which commends itself as evident.'
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