Concavity and points of inflection Answer the following questions using the function f x e The first derivative of the given function is The second derivative of the given function is x 0 f has points of inflection that occur at x NOTE If you believe the answer is none type none Otherwise state the values as a comma separated list if needec f is concave down on ar and concave up on NOTE State the open intervals of concavity as a comma separated list if needed