In: Math
Consider the equation below. (If an answer does not exist, enter DNE.) f(x) = x3 − 6x2 − 15x + 9 (a) Find the interval on which f is increasing. (Enter your answer using interval notation.) Incorrect: Your answer is incorrect. Find the interval on which f is decreasing. (Enter your answer using interval notation.) Incorrect: Your answer is incorrect. (b) Find the local minimum and maximum values of f. local minimum value local maximum value (c) Find the inflection point. (x, y) = Find the interval on which f is concave up. (Enter your answer using interval notation.) Find the interval on which f is concave down. (Enter your answer using interval notation.)