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Given the function f(x) = x^(3) - 1. Fin...

Given the function `f(x) = x^(3) - 1`. Find f(1), f(a), f(a+1).

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`f(x) = x^(3) -1`
`f(a) = a^(3) -1`
`f(a+1) = (a+1)^(3) -1`
`= a^(3) + 3a^(2) + 3a`
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