Posted by Destiny on .
find the intervals on which the function is increasing or decreasing and find any relative minima or maxima.
f(x)=0.2x^30.2x^25x4

College Alg 
Steve,
f=1/5 (x+4)(x^2  5x  5)
f' = .6x^2  .4x  5
f'=0 at x = 1/3 (1 ± 2√19)
f increases where f' > 0