For a certain function f, the first derivative is given as f`(x) = 3x^{2} + 8x  3

9.1Calculates the xcoordinates of the stationary points of f(3)

9.2For which values of x is f concave down?(3)

9.3Determine the values of x for which f is strictly increasing.(2)

9.4If it is further given that f(x) = ax^{3} + bx^{2} + 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":""}]