2.3.7. write each open interval in the form |x-a

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.1: Real Numbers
Problem 25E
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Please solve these mathematical problem. 

2.3.7. write each open interval in the form |x-a<r,
(a) 3<x<9, (b) -5≤x≤1,
2.3.8.Rewrite
each set using an infinite interval notation.:
(a) x <-4, (b) x≤5, (c) x ≥ 2 (d) x <-3
Transcribed Image Text:2.3.7. write each open interval in the form |x-a<r, (a) 3<x<9, (b) -5≤x≤1, 2.3.8.Rewrite each set using an infinite interval notation.: (a) x <-4, (b) x≤5, (c) x ≥ 2 (d) x <-3
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