Prove that for all a, m, b ∈ R, the function f(x) = mx + b is continuous at a.
Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter5: Rings, Integral Domains, And Fields
Section5.4: Ordered Integral Domains
Problem 1E: Complete the proof of Theorem 5.30 by providing the following statements, where and are arbitrary...
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A function f : R → R is continuous at the point a ∈ R if (and only if)
it satisfies the following condition:
∀ > 0, ∃δ > 0, |x − a| < δ −→ |f(x) − f(a)| < .
(The universe for all variables is R.)
Prove that for all a, m, b ∈ R, the function f(x) = mx + b is continuous at a.
Remark: A function f : R → R is continuous at the point a ∈ R if (and only if)
limx→a f(x) = f(a).
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