Determine the point(s), if any, at which the graph of the function has a horizontal tangent line.  y = x4 − 2x2 + 7

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter8: Linear Functions
Section8.2: Linear Equations In Two Variables
Problem 2E
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Determine the point(s), if any, at which the graph of the function has a horizontal tangent line. 

y = x4 − 2x2 + 7

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