lim f(x) # lim f(x). I c-

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.1: Infinite Sequences And Summation Notation
Problem 72E
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Answer second question ( question 5) 

4. Let f : R → R be continuous and surjective. Let E = {x € R : f(x) € (0,1)}. Can E be the set
of subsequential limits of some sequence (xn)? Would your answer change if f is not assumed to be
surjective? Justify your answers.
5. Let a, b, and c be real numbers with a <c<b and let f: (a, b) → R be a monotone function. If c is a
point of discontinuity of f, prove that
lim f(x)# lim f(x).
a+ ct
Transcribed Image Text:4. Let f : R → R be continuous and surjective. Let E = {x € R : f(x) € (0,1)}. Can E be the set of subsequential limits of some sequence (xn)? Would your answer change if f is not assumed to be surjective? Justify your answers. 5. Let a, b, and c be real numbers with a <c<b and let f: (a, b) → R be a monotone function. If c is a point of discontinuity of f, prove that lim f(x)# lim f(x). a+ ct
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