For the function below, find (a) the critical numbers; (b) the open intervals where the function is increasing; and (c) the open

Question

For the function below, find (a) the critical numbers; (b) the open intervals where the function is increasing; and (c) the open intervals where it is decreasing.
f(x) = (x+8) / (x + 3)
(a) Find the critical number(s). First, find f'(x).

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