every cauchy sequence is convergent
is it true generally plz friends i am confused so much
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Yes it is true.
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Explanation in comment.
riyazahemadansari197:
Every cauchy sequence of real numbers is bounded, hence by Bolzano - Weierstrass has a convergent subsequence, hence is itself convergent. This proof of the completeness of the real numbers implicitly makes use of the least upper bound axiom.
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