Use the test for concavity to find the intervals of concavity and state any POI. 3 1. f (x) = 2x³- 6x2+6x - 3 2.9 (x) = x²e² 3. h (x) = In (x) x = Make sure to make a table for your intervals, x value, and f"(x) value Write a formal answer in the form: . On the interval (_ There is a POI at x=_____ _) f(x) is (concave up/down) because f"(x) is (positive/negative) on f(x) becasue f"(x) changes signs