if x+1/x=1 then x^3
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x + (1/x) = 1
(x^2 + 1) / x = 1
x^2 - x + 1 = 0
(x - 1)(x - 1) = 0
So, x = 1
Therefore, x^3 = 1
(x^2 + 1) / x = 1
x^2 - x + 1 = 0
(x - 1)(x - 1) = 0
So, x = 1
Therefore, x^3 = 1
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