2x + 2 x² + x + 1 (a) Find all partition numbers of f'(x). (Enter your answers as a comma-separated list. If an answer does not exist, ente -1+√3-1-√3 et f(x): = X = X = 2 (b) Find all critical values of f(x). (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE. -1+√3-1-√3 2 2 -∞, X 2 X (c) Find the interval(s) where f(x) is increasing. (Enter your answer using interval notation.) --√3 -1+√3) 2 2 X (d) Find the interval(s) where f(x) is decreasing. (Enter your answer using interval notation.) -1-√³)(=1=√³,00) U 2 X

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