Suppose A CR and B CR are sets, and that a = sup A and b = sup B exist. (a) Prove that ANB is bounded above by a (and also by b). (b) Suppose ANB+ 0. Prove that ANB has a supremum, m say, and that m < min{a, b}. (c) If An B+ Ø is it necessarily the case that m = proof or give a counterexample. min{a, b}? Either give a
Suppose A CR and B CR are sets, and that a = sup A and b = sup B exist. (a) Prove that ANB is bounded above by a (and also by b). (b) Suppose ANB+ 0. Prove that ANB has a supremum, m say, and that m < min{a, b}. (c) If An B+ Ø is it necessarily the case that m = proof or give a counterexample. min{a, b}? Either give a
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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prove supremum

Transcribed Image Text:Suppose A C R and B C R are sets, and that a
sup A and b = sup B
exist.
(a) Prove that ANB is bounded above by a (and also by b).
(b) Suppose ANB# 0. Prove that ANB has a supremum, m say, and that
m < min{a, b}.
min{a, b}? Either give a
(c) If An B + 0 is it necessarily the case that m =
proof or give a counterexample.
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