converging infinite sum | Mathematics | Page 1

tame ginkgo Aug 1, 2024, 8:11 PM

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how was this derived? ive never seen this before

gilded graniteBOT Aug 1, 2024, 8:11 PM

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untold storm Aug 1, 2024, 10:10 PM

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Prove that $\sum_{k=1}^n \frac{k^3}{2^k}=26-\frac{n^3+6n^2+18n+26}{2^n}$, then just take the limit

tame ginkgo Aug 1, 2024, 10:12 PM

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you mean k^3/2^k instead right?

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and also how did you get that

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just curious

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@untold storm

untold storm Aug 1, 2024, 10:15 PM

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Yes I did

astral wedgeBOT Aug 1, 2024, 10:15 PM

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SWR

#converging infinite sum