Prove that f (x) = x4 + 5x3 + 4x has no root c satisfying c > 0. Hint: Note that x = 0 is a root and apply Rolle’sTheorem.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter3: Polynomial And Rational Functions
Section3.1: Quadratic Functions And Models
Problem 1E: To put the quadratic function f(x)=ax2+bx+c in standard form, we complete the ________________.
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Prove that f (x) = x4 + 5x3 + 4x has no root c satisfying c > 0. Hint: Note that x = 0 is a root and apply Rolle’s
Theorem.

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