Let f (x) = 12x^5 + 15x^4 − 40x^3 + 1, defined on R.
(a) Find the intervals where f is increasing, and
decreasing.
(b) Find the intervals where f is concave up, and concave
down. (c) Find the local maxima, the local minima, and the
inflection points.
(d) Find the Maximum and Minimum Absolute of f over [−2,
2].