Assume that f: [0, ∞) → R is a continuous function such that lim ƒ(x) = ∞. x48 a) Prove that f admits a minimum on [0, ∞). o) Does the statement of part (a) remain true in general if we remove the condition lim f(x) = x48 co? Justify your answer.

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter3: Functions
Section3.3: More On Functions; Piecewise-defined Functions
Problem 99E: Determine if the statemment is true or false. If the statement is false, then correct it and make it...
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Real Analysis, Continuous functions 

Exercise 0.3.
Assume that f : [0, 00) → R is a continuous function such that lim f(x) =
= 0.
(a) Prove that f admits a minimum on [0, 0).
(b) Does the statement of part (a) remain true in general if we remove the condition lim f(x) =
0? Justify your answer.
Transcribed Image Text:Exercise 0.3. Assume that f : [0, 00) → R is a continuous function such that lim f(x) = = 0. (a) Prove that f admits a minimum on [0, 0). (b) Does the statement of part (a) remain true in general if we remove the condition lim f(x) = 0? Justify your answer.
Expert Solution
Step 1: Introduction

Given that f colon stretchy left square bracket 0 comma infinity stretchy right parenthesis rightwards arrow straight real numbers is a continuous function such that limit as x rightwards arrow infinity of f open parentheses x close parentheses equals infinity.

(a)

We need to prove that f attain its minimum value on stretchy left square bracket 0 comma infinity stretchy right parenthesis.

(b)

We need to determine whether the statement (a) is still be true, if we remove the condition limit as x rightwards arrow infinity of f open parentheses x close parentheses equals infinity.

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