Question: (a) If f(x) = (x2 - 1) /(x2 + 1), find f'(x) and f'(x). (b) Check to see that your answers to part (a) are

(a) If f(x) = (x2 - 1) /(x2 + 1), find f'(x) and f"'(x).
(b) Check to see that your answers to part (a) are reasonable by comparing the graphs of f, f' and f"'.

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