3. Suppose that (X, d) is a metric space which is not compact. Let {an}_1 be a sequence of distinct points in X that has no convergent subsequences. For each nЄ N, take rn > 0 such that Brn (an)Brm (am) = 0 for n‡m. Let and fn(2): := rn - d(x, a) ™n +d(x, an) n I fn(x), if x € Brn (an) for some n € N; otherwise. f(x) = { 0, Show that fn and f are continuous functions. Is f bounded?

Advanced Engineering Mathematics
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Author:Erwin Kreyszig
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n=
3. Suppose that (X, d) is a metric space which is not compact. Let {an}_1 be a sequence
of distinct points in X that has no convergent subsequences. For each n€ N, take
˜n > 0 such that Brn (an) Brm (am) = Ø) for n ‡ m. Let
fn(2):=
and
rn - d(x, a)
™n + d(x, an)
n
f(x) = { fn(x), if a € Br. (an) for some n € N;
otherwise.
9
Show that fn and f are continuous functions. Is f bounded?
Transcribed Image Text:n= 3. Suppose that (X, d) is a metric space which is not compact. Let {an}_1 be a sequence of distinct points in X that has no convergent subsequences. For each n€ N, take ˜n > 0 such that Brn (an) Brm (am) = Ø) for n ‡ m. Let fn(2):= and rn - d(x, a) ™n + d(x, an) n f(x) = { fn(x), if a € Br. (an) for some n € N; otherwise. 9 Show that fn and f are continuous functions. Is f bounded?
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