First, a quick question about limits. Is it true that if a function "flip-flops" between positive and negative values, the limit does not exist? Say in the case of(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\lim_{n\rightarrow\infty} (-10)^{n} [/tex] ?

Second, I'm having some difficulty with a problem and I'm not quite sure how to start.

)If thenth partial sum of a series [itex]\Sigma_{n=1}^{\infty} a_n [/itex] is [itex] s_n = 3-2^{-n}n [/itex], find [itex]a_n[/itex] and [itex]\Sigma_{n=1}^{\infty} a_n [/itex].

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# Homework Help: Limits and series

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