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Black Book Advanced Problems in MathematicsMathematicsFunctions

If f : R R , f(x) = ax + x is an invertible function, then complete set of values of a is :

Options

  1. A(-2, -1] [1, 2)
  2. B[-1, 1]
  3. C(- , -1] [1, )
  4. D(- , -2] [2, )

Correct answer

C. (- , -1] [1, )

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