9-18 (a) Find the intervals on which f is increasing or decreasing. (b) Find the local maximum and minimum values of f. (c) Find the intervals of concavity and the inflection points. 9. f(x) = x³ – 3x² – 9x + 4 - 10. f(x) = 2x³ – 9x² + 12x – 3 %3D

Algebra and Trigonometry (MindTap Course List)
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ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
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Chapter2: Functions
Section2.CT: Chapter Test
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I am unsure where to even start on questions 10 and 11. Should I start by finding ther derivative then set to zero? I don't know what would come after that. 

9-18
(a) Find the intervals on which f is increasing or decreasing.
(b) Find the local maximum and minimum values of f.
(c) Find the intervals of concavity and the inflection points.
9. f(x) = x³ – 3x² – 9x + 4
-
10. f(x) = 2x³ – 9x² + 12x – 3
%3D
Transcribed Image Text:9-18 (a) Find the intervals on which f is increasing or decreasing. (b) Find the local maximum and minimum values of f. (c) Find the intervals of concavity and the inflection points. 9. f(x) = x³ – 3x² – 9x + 4 - 10. f(x) = 2x³ – 9x² + 12x – 3 %3D
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