Find the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema. f(x) = (x+3)

Question

Find the intervals on which f(x) is increasing, the intervals on which f(x) is decreasing, and the local extrema.
f(x) = (x+3) ex
Compute the derivative of f(x).
f'(x) =
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The function is increasing on
(Type your answer using interval notation. Type integers or simplified fractions. Use a comma to separate answers as needed.)
B. The function is never increasing.
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A. The function is decreasing on
(Type your answer using interval notation. Type integers or simplified fractions. Use a comma to separate answers as needed.)
B. The function is never decreasing.

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