For a certain function f, the first derivative is given as f`(x) = 3x2 + 8x - 3
  1. 9.1
    Calculates the x-coordinates of the stationary points of f
    (3)
    1. 9.2
      For which values of x is f concave down?
      (3)
      1. 9.3
        Determine the values of x for which f is strictly increasing.
        (2)
        1. 9.4
          If it is further given that f(x) = ax3 + bx2 + cx + d and f(0) = -18, determine the equation of f.
          (5)
          (13)
          [{"prnt":"9","num":"9.1","answer":""},{"prnt":"9","num":"9.2","answer":""},{"prnt":"9","num":"9.3","answer":""},{"prnt":"9","num":"9.4","answer":""}]

          Answers

            1. 9.1
            2. 9.2
            3. 9.3
            4. 9.4
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