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D Question 7 Find the largest open intervals where f(x) = -3x2+ 18x + 16 is concave upward. O (-60, 3) O (-00, 00) O

D Question 7 Find the largest open intervals where f(x) = -3x2+ 18x + 16 is concave upward. O (-60, 3) O (-00, 00) O (3, 00 ) None

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