have you solved for f'=0 and g' = 0?
(A) f(x) = ln(x4 + 27),
(B) g(x) = 3x2/3 − x
(a) Find the interval of increase and Find decrease.
(b) Find the local minimum value.
Find the interval where the function is concave up and concave down.
Somebody help me, please?