Find the coordinates of points where the graph off(x) = x4 − 4x3 + 7has horizontal tangents. As a check, graph f(x) and see whether the points you found look as though they have horizontal tangents.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter9: Quadratic Functions And Equations
Section9.6: Solving Quadratic Equations By Using The Quadratic Formula
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Find the coordinates of points where the graph of
f(x) = x4 − 4x3 + 7
has horizontal tangents. As a check, graph f(x) and see whether the points you found look as though they have horizontal tangents.

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