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Miscellaneous·2014·Easy

Consider the function f(x) = (x – 1)/(x + 1). What is ( f(x) + 1 ) / ( f(x) – 1 ) × x equal to ?

Consider the function f(x) = (x – 1)/(x + 1). What is ( f(x) + 1 ) / ( f(x) – 1 ) × x equal to ?

Options

  1. a.

    0

  2. b.

    1

  3. c.

    2x

  4. d.

    4x

    Correct answer

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