For what values of a and b is the line 4x + y = b tangent to the parabola y = ax2 when x = 4?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter4: Rational Functions And Conics
Section4.4: Translations Of Conics
Problem 2ECP
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For what values of a and b is the line

4x + y = b

tangent to the parabola

y = ax2

when

x = 4?
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