3 Find the open intervals where the function f(x) = -2x³ + 6x² +171x-2 is concave upward or concave Find any inflection points. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

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A: we will find the required.

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Q: not all questions are answered, and are incorrect

A: According to me all questions' answered are correct

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