Plot (x) = x/(x 2 1) (in a suitably bounded viewing box). Use the plot to
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Plot ƒ(x) = x/(x2 − 1) (in a suitably bounded viewing box). Use the plot to determine whether ƒ'(x) is positive or negative on its domain {x : x ≠ ± 1}. Then compute ƒ'(x) and confirm your conclusion algebraically.
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Rustia Melrod
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