I can't seem to find the f ' (x) of the following:(adsbygoogle = window.adsbygoogle || []).push({});

1) f(x) = -2x - ((128)/(x+9))

2) f(x) = (x+4)^2 (x-10)^3

(Find the number x at which the function f(x) = (x+4)^2 (x-10)^3 takes on an absolute minimum on the interval 4 < x < 10 (note: < means greater than or equal to)

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Help: derivative and critical #'s

**Physics Forums | Science Articles, Homework Help, Discussion**