I know that if a series converges, the following applies:
$$
\sum_{n=i}^\infty c a_n = c \sum_{n=i}^\infty a_n
$$
However, I can't seem to find any info on whether this holds for diverging series as well. The property is often mentioned together with this one, of which I know it does not apply to divergent series:
$$
\sum_{n=i}^\infty a_n + b_n= \sum_{n=i}^\infty a_n + \sum_{n=i}^\infty b_n
$$
This makes me think the first property might require the same condition, but I'm not sure.
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