Question: Consider the following function. ln(x) x f(x) = (a) Determine the interval(s) where the function is concave upward. (Enter your answer using interval notation. If

Consider the following function. ln(x) x f(x) = (a) Determine the interval(s) where the function is concave upward. (Enter your answer using interval notation. If an answer does not exist, enter DNE.) (b) Determine the interval(s) where the function is concave downward. (Enter your answer using interval notation. If an answer does not exist, enter DNE.)

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