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At which value(s) for x does the graph of y = x³x² - 20x - 9 have horizontal tangent lines?

At which value(s) for x does the graph of y = x³x² - 20x - 9 have horizontal tangent lines?

Calculus: Early Transcendentals
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Question
3. Analysis II At which value(s) for x does the graph of y = x³ - 2/x² – 20x - 9 have horizontal tangent lines?
Transcribed Image Text:3. Analysis II At which value(s) for x does the graph of y = x³ - 2/x² – 20x - 9 have horizontal tangent lines?
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