About these formulas:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\frac{n(n+1)}{2}, \frac{n(n+1)(2n+1)}{6} ,(\frac{n(n+1)}{2})^2[/tex]

How were they evolved?

And what about [tex]i^4, i^5, i^6,...[/tex]

Thankyou everybody;;

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# Homework Help: Riemann Sum

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