Prove that f (x) = x2 is eventually greater than any affine function, i.e., any function of the form g(x) = ax + b. In other words, (∀a, b ∈R)(∃x0 ∈R)(∀x ∈R)(x > x0 →x2 > ax + b).

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter9: Quadratic Functions And Equations
Section9.9: Combining Functions
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Prove that f (x) = x2 is eventually greater than any affine function, i.e.,
any function of the form g(x) = ax + b. In other words,
(∀a, b ∈R)(∃x0 ∈R)(∀x ∈R)(x > x0 →x2 > ax + b).

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