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Black Book Advanced Problems in MathematicsMathematicsApplication of Derivatives

The function f(x) = 1 + x (x + 1 + x^2 ) - 1 + x^2 is :

Options

  1. Astrictly increasing x (0, 1)
  2. Bstrictly decreasing x (-1, 0)
  3. Cstrictly decreasing for x (-1, 0)
  4. Dstrictly decreasing for x (0, 1)

Correct answer

A. strictly increasing x (0, 1)

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