I have a function, [tex]\frac{x^3}{e^x-1}[/tex](adsbygoogle = window.adsbygoogle || []).push({});

The question than says expand the denominator as a power series in [tex]e^{-x}[/tex].

I don't understand this question. How do I start doing that? It is not suggesting to approximate [tex]\frac{1}{e^x-1}[/tex] as [tex]e^{-x}[/tex] is it?

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# Homework Help: Power Series?

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