### Home > APCALC > Chapter 3 > Lesson 3.4.3 > Problem3-180

3-180.

Let $f(x) = x^3 − 3x^2 − 24x + k$ where $k$ is a constant. Over what intervals is $f$ increasing?

$f(x)$ increases when $f^\prime (x)>0$.

Refer to the hints in problem 3-149 for more guidance.