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Black Book Advanced Problems in MathematicsMathematicsApplication of Derivatives

The difference between the greatest and the least value of the function f(x) = x + 1 2 2x - 1 3 3x is :

Options

  1. A11 5
  2. B13 6
  3. C9 4
  4. D7 3

Correct answer

C. 9 4

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