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Black Book Advanced Problems in MathematicsMathematicsApplication of Derivatives

The function f(x) = ^3 x - m x is defined on open interval (- 2 , 2 ) and if assumes only 1 maximum value and only 1 minimum value on this interval. Then, which one of the following must be correct ?

Options

  1. A0 < m < 3
  2. B-3 < m < 0
  3. Cm > 3
  4. Dm < -3

Correct answer

A. 0 < m < 3

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