Question

g(x) = 220 + 8x3 + x4
Part (a)
Find the interval(s) of increase. Find the interval(s) of decrease.

Part (b)
Find the local maximum value(s). Find the local minimum value(s).

Part (c)
Find the interval(s) where the graph is concave upward. Find the interval(s) where the graph is concave downward. Find the inflection points.

Answer 1

increase is from -6 to infinity decrease is from -inf to -6 -6 being the local min and the max is -inf and +inf