Let X be the set of all continuous functions defined on the interval [a,b]. Let d: X × X →R be a function defined as follows d(f,8)=f[f(x)-8(x)| dx ¥f•g eX Show that (X,d )is a metric space

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Let X be the set of all continuous functions defined on the interval
[a,b]. Let d: X x X R be a function defined as follows
d(S.8) = j[/(x)- «(x) dx V.g eX
Show that (X,d)is a metric space
Remark: f and g are continuous functions so f - g| is continuous.
Remark: Since integral of a continuous function over a closed and
bounded interval is always finite, therefore d(f.g) exists for any
f.g e X. Thus d is a well-defined function
Transcribed Image Text:Let X be the set of all continuous functions defined on the interval [a,b]. Let d: X x X R be a function defined as follows d(S.8) = j[/(x)- «(x) dx V.g eX Show that (X,d)is a metric space Remark: f and g are continuous functions so f - g| is continuous. Remark: Since integral of a continuous function over a closed and bounded interval is always finite, therefore d(f.g) exists for any f.g e X. Thus d is a well-defined function
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