Let K be a compact subset of a metric space X, and assume that -R is continuous. Prove that f achieves a maximum and a minimum K quoh thot

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2.9.14) Let K be a compact subset of a metric space X, and assume that
f: K R is continuous. Prove that f achieves a maximum and a minimum
on K, i.e., there exist points x, y E K such that
f(y)
sup{f(t) : t € K}.
f(x) = inf{f(t) : te K}
and
Transcribed Image Text:2.9.14) Let K be a compact subset of a metric space X, and assume that f: K R is continuous. Prove that f achieves a maximum and a minimum on K, i.e., there exist points x, y E K such that f(y) sup{f(t) : t € K}. f(x) = inf{f(t) : te K} and
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