Question: 9. Consider f(x) = xel- . Determine the interval(s) on which f is concave up and the interval(s) on which f is concave down. List

9. Consider f(x) = xel- . Determine the interval(s) on which f is concave up and the interval(s) on which f is concave down. List the points of inflection. (Be sure to justify your conclusions!) [8 points]

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