Let f (x) = x³ + 4x² + 2x + 2. Determine the interval in which f (x) is concave upward. Note: Format your answer in interval notation, like this:(_, _). Retain any fractions.

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Q: Find and classify the extremes value of    f(x) = 6x4 - 4x6  over the interval [ -2,2].

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Q: Find and classify the extremes value of f(x)=6x* – 4x° over the interval [-2,2].

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Q: Find and classify the extremes value of f(x)=6x4 - 4x6  over the interval [-2,2].

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