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# /sci/ - Science & Math

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 >> Anonymous Wed Apr 4 09:01:53 2018 No.9644737 [View] File: 13 KB, 225x225, images.jpg [View same] [iqdb] [saucenao] [google] [report] >>9644570Please don't rub salt in the wound
 >> King Brainlet Thu Nov 9 13:31:40 2017 No.9285471 [View] File: 13 KB, 225x225, 1503247350492.jpg [View same] [iqdb] [saucenao] [google] [report] how do I show $x_{n} = \frac{1}{2^{n}}$ is cauchy using the definition: $\forall \hspace{0.2cm} \epsilon > 0\hspace{0.2cm} \exists\hspace{0.2cm} N \in \mathbb{N}\hspace{0.2cm} \text{such that}\hspace{0.2cm} \forall\hspace{0.2cm} m,n \geq N, |x_{n}-x_{m}| < \epsilon$I get as far as $\big| \frac{1}{2^{n}} - \frac{1}{2^{m}} \big| = \big| \frac{2^{m}+2^{n}}{2^{n+m}} \big|$
 >> Anonymous Thu Oct 5 08:23:00 2017 No.9212924 [View] File: 13 KB, 225x225, 1503247350492.jpg [View same] [iqdb] [saucenao] [google] [report] >>9212918t-thanksi'm trying to get better anon, this takes time.
 >> Anonymous Thu Sep 28 13:31:56 2017 No.9196702 [View] File: 13 KB, 225x225, 1503247350492.jpg [View same] [iqdb] [saucenao] [google] [report] >>9196683fuck this question, it's so simple but my iq is too low. t-thanks for the quick response

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