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If a series diverges, there exists a sequence convergent to zero such that the series of their termwise product is divergent. [closed]

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Let $\sum y_n$ diverge. Then there exists a sequence $x_n$ such that $\lim_{n\rightarrow\infty}x_n=0$ and $\sum x_ny_n$ diverges.

Is this true? How should I prove this?


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