MTH 31 131 . II f"(x)

If f 0 fov all in l, (licti grnph of f ig concave on L (11) A point, P on a curve y f iB enllecl nn inflection point if f i" continuoug there and the clovnges from (12) Give example of n function where concavity changes from upward to downward at, = 2 and the curve has nn inflection point. Draw its graph. (13) Give an example of a function where concavity changes from downward to upward at 2 and the curve has an inflection point. Draw its graph. (14) Give an cxamplc of a function whcrc concavity chungcs from upward to downward at r = 2 and the curve docs not havc nn inflection point. Draw its graph. (15) Givc nn example of a function where concavity changes (rom downward to upward at x 2 and thc curve does not havo an inflection point, Draw its graph,