February 25, 2017

Homework Help: Calculus

Posted by Katia on Wednesday, March 9, 2011 at 3:49pm.

find the intervals where the function is increasing and the intervals where it is decreasing
f(x)= (x^3/3)-(x^2/2)

ok i found its derivative
which is (f1(x)=(x-1)x

my options are increasing a) (0,infinity) b) (-1,0) c(-infinity,0)U(1,infinity)

decreasing a) (0,1) b) (-infinity,0)U(1,infinity)

i cant seem to find the correct answers
because it is increasing from -infinitive to -1. then increasing from -1,0 decreasing from 0,1 and increasing again from (1, infinity)

what im i doing wrong?

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