APPLICATION 6. If f(x) = x' -3x -1, at what x-values will inflection points occur? [3] 7. Consider the function f(x) = x3- 3x2 + 4x . Determine the interval(s) on which the graph is concave up and the interval(s) in which it is concave down. [8] 8. Find "c" given that the graph of f (x) = cx2 - - has a point of inflection at x=4.[4] THINKING 9. Determine if the function y=itsin@+2ncos0 is a solution to the differential equation y"ty=0. [5] 10. Sketch g (x) = - _6x2-2 - [10]