Prove:(adsbygoogle = window.adsbygoogle || []).push({});

[tex] \sum^{n}_{k=0} {z^{k}} = \frac{z^{n+1} -1}{z-1} [/tex]

[tex] z \in \mathbb{C} [/tex]

I have no idea where to even start. Just some hints on the strategy/pattern we are supposed to see would be great.

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# Homework Help: Proof of complex sum

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