Let a eR which expressions are correct? and give the justification why they are part of the Borel o-algebra, B(R) 1 ,a+ u- 1 a + {a} {a} nEN Q = U{a;}. a, is rational U {ai}, a, is irrational ieN U(--) 1 {a} U {a,}. a, is rational U («.}, a, is rational

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.4: Fractional Expressions
Problem 64E
Question
Mathematical analysis
Let a eR which expressions are correct? and give the justification why
they are part of the Borel o-algebra, B(R)
{a}
1
a +
{a}
--, a+
n
nEN
Q = U{a;}. a; is rational
U {ai}, a, is irrational
%3D
ieN
U(-)
{n}
U{a,}. a; is rational
U (a.}, , is rational
Transcribed Image Text:Let a eR which expressions are correct? and give the justification why they are part of the Borel o-algebra, B(R) {a} 1 a + {a} --, a+ n nEN Q = U{a;}. a; is rational U {ai}, a, is irrational %3D ieN U(-) {n} U{a,}. a; is rational U (a.}, , is rational
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