Question: Question 7 (2 points) Determine the open intervals on which the graph of f (x) = -8x3 + 6x + 8x downward or concave upward.

Question 7 (2 points) Determine the open intervals on which the

Question 7 (2 points) Determine the open intervals on which the graph of f (x) = -8x3 + 6x + 8x downward or concave upward. a) concave downward on ( Do , Do b ) concave downward on concave upward on C ) concave upward on - 00 . - 4 : co concave downward on d ) concave downward on 1- DO . - 4 : CO1 concave upward on O e) concave upward on on - 90 . # ; concave d

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