Determine the open intervals on which the graph of is concave downward or concave upward.
?

A. concave downward on ;

concave upward on


B. concave downward on ;

concave upward on


C. concave upward on ;

concave downward on


D. concave downward on ;

concave upward on


E. concave upward on ;

concave downward on


Answer: E

Mathematics

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