At what point does the graph of the function f(x) = x³ – 3x has horizontal tangent ? Find equations of all lines having slope -1 that are tangent to the curve y = I-1°

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section1.3: Lines
Problem 3E
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a) At what point does the graph of the function f(x) = x³ – 3x has horizontal tangent ?
b) Find equations of all lines having slope –1 that are tangent to the curve y
I-1
Transcribed Image Text:a) At what point does the graph of the function f(x) = x³ – 3x has horizontal tangent ? b) Find equations of all lines having slope –1 that are tangent to the curve y I-1
Expert Solution
Answer:

a) Points are (1,-2) and (-1,2)

b) Lines are y=-x-1, and y=-x+3

Explanation: (a)

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