Find the intervals of concavity for the function f(x) = -x^3 + x^2 + x.
Added by Consuelo B.
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Given f(x) = -x^3 + x^2 + x, the first derivative f'(x) is obtained by differentiating the function with respect to x: f'(x) = -3x^2 + 2x + 1. ** Show more…
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