f(x) =4x^3 -24x^2 -60x a. find all values of x that correspond to horizontal tangent lines. b. determine the open intervals on which the function is increasing and on which the function is decreasing. increasing: decreasing:

Trigonometry (MindTap Course List)
10th Edition
ISBN:9781337278461
Author:Ron Larson
Publisher:Ron Larson
ChapterP: Prerequisites
SectionP.6: Analyzing Graphs Of Functions
Problem 2ECP
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f(x) =4x^3 -24x^2 -60x

a. find all values of x that correspond to horizontal tangent lines.

b. determine the open intervals on which the function is increasing and on which the function is decreasing.

increasing:

decreasing:

 

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