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Determine the open intervals on which the graph is concave upward or concave downward. f(x) = 13 x2+27 Concave upward: (−∞, −3) (−3, 3) (−∞, −3)∪(3, ∞) (−∞, ∞) none of these Concave downward: (−∞, −3) (−3, 3) (−∞, −3)∪(3, ∞) (−∞, ∞) none of these

Determine the open intervals on which the graph is concave upward or concave downward. f(x) = 13 x2+27 Concave upward: (−∞, −3) (−3, 3) (−∞, −3)∪(3, ∞) (−∞, ∞) none of these Concave downward: (−∞, −3) (−3, 3) (−∞, −3)∪(3, ∞) (−∞, ∞) none of these

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Determine the open intervals on which the graph is concave upward or concave downward.
f ( x ) = 13 x 2 + 27
Concave upward: ( − ∞ , − 3 ) ( − 3 , 3 ) ( − ∞ , − 3 ) ∪ ( 3 , ∞ ) ( − ∞ , ∞ ) none of these
Concave downward: ( − ∞ , − 3 ) ( − 3 , 3 ) ( − ∞ , − 3 ) ∪ ( 3 , ∞ ) ( − ∞ , ∞ ) none of these

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