Let f be a function defined on ]0, 1[ by : 0, if x is irrațional f (x) = {1/q, if x=p/q; where p and q are positive integers having no common factor. Prove that f is continuous at each irrational point and discontinuous at oach rational noint

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter7: Distance And Approximation
Section7.5: Applications
Problem 27EQ
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Each case discuss Proof the statement

Let f be a function defined on ]0, 1[ by : n
0, if x is irrațional
f (x) = {1/q, if x=p/q; where p and q are positive
integers having no common factor.
Prove that f is continuous at each irrational point and discontinuous
at each rational point.
Transcribed Image Text:Let f be a function defined on ]0, 1[ by : n 0, if x is irrațional f (x) = {1/q, if x=p/q; where p and q are positive integers having no common factor. Prove that f is continuous at each irrational point and discontinuous at each rational point.
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