Question: Answer all please Let f(x) = In(x2 + 1) +4. (a) f(x) has one critical number. What is it? (b) Determine the interval(s) on which

Answer all please

Let f(x) = In(x2 + 1) +4. (a) f(x) has one critical number. What is it? (b) Determine the interval(s) on which f(x) is increasing and the interval(s) on which f(x) is decreasing. (c) Is the critical number you found in part (a) a local maximum, local minimum, or neither? Explain

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