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4) Let f(x) = x 4x. Let S = {x [-5, 5] | f(x) 0}, T = {x [-5,5] | f(x) >0}. a) Express
4) Let f(x) = x 4x. Let S = {x [-5, 5] | f(x) 0}, T = {x [-5,5] | f(x) >0}. a) Express both S and T as an interval or a union of intervals. b) Find lub(S). What is f(lub(S))? c) Find glb(T). What is f(glb(T))?
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An Introduction to Analysis
Authors: William R. Wade
4th edition
132296381, 978-0132296380
