Can you prove the following Cauchy sequence

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Let (An) be a Cauchy sequence such that n is a member of N, and let c be a member of R, prove that (c*An) is also a Cauchy sequence

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If $c=0$, then we are done.

Let $c \ne 0$. Then

$|cA_n-cA_m|=|c||A_n-A_m| < \epsilon \iff |A_n-A_m|< \frac{\epsilon}{|c|}$.

Can you procced ?