fderingoz
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Homework Statement
Is the proposition
\sum^{\infty}_{n=1}|x_{n}|=0 ⇔\foralln\inIN x_{n}=0
true? If it is true how can we prove that ?
Homework Equations
The Attempt at a Solution
I proved the \Leftarrow side of proposition but i could not prove the \Rightarrow side of proposition.