List questions from summation

Published on 09 Apr 2026 - 8:07

127

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$\sum(-1)^{k}k^{2}C_{n}^{k}$

Published on 16 Apr 2026 - 4:30

101

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$\frac{1+\frac{1}{2^{11}}+\frac{1}{3^{11}}+\frac{1}{4^{11}}+...}{1-\frac{1}{2^{11}}+\frac{1}{3^{11}}-\frac{1}{4^{11}}+...}$

Published on 17 Apr 2026 - 10:03

83

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Combinatorics Proof 3kCk

Published on 13 Apr 2026 - 16:11

124

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Is the Sum of Coefficients of a Continued Fraction unique?

Published on 26 Mar 2026 - 21:27

71

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Infinite sum power series

Published on 10 Apr 2026 - 21:33

287

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Find the value of- $\lim_{x \rightarrow -\infty}\sum_{k=1}^{1000} \frac{x^k}{k!}$

Published on 13 Apr 2026 - 23:52

22

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Find sum, occuring in ordered statistics pdf derivation

Published on 28 Mar 2026 - 2:02

373

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Partial sum of binomial coefficients n choose k multplied by k for k from n/2+1 to n

Published on 15 Apr 2026 - 7:29

151

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Given positive integers $n, k, i,$ prove $\binom{n}{k} = \sum_{j=i}^{n-k+i}\binom{j-i}{i-1}\binom{n-j}{k-i}$

Published on 16 Apr 2026 - 17:33

124

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Integral of product of 3D Gaussians

Published on 11 Apr 2026 - 15:25

35

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Is there a notation for summing a non-variable set of exponents

Published on 10 Apr 2026 - 17:58

66

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Is there a solution to this ? $f_0(n)=2n−1,\\ f_{k+1}(n)=\sum_{i=1}^nf_k(i)$

Published on 16 Apr 2026 - 14:41

139

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Entropy of partitioning for set of all $\binom{n}{k}$ combinations

Published on 14 Apr 2026 - 21:15

28

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Probability of different winner in two voting systems

Published on 10 May 2026 - 18:25

List Question

Sum of products basics (proof verification)

$\sum(-1)^{k}k^{2}C_{n}^{k}$

$\frac{1+\frac{1}{2^{11}}+\frac{1}{3^{11}}+\frac{1}{4^{11}}+...}{1-\frac{1}{2^{11}}+\frac{1}{3^{11}}-\frac{1}{4^{11}}+...}$

Combinatorics Proof 3kCk

Is the Sum of Coefficients of a Continued Fraction unique?

Infinite sum power series

Find the value of- $\lim_{x \rightarrow -\infty}\sum_{k=1}^{1000} \frac{x^k}{k!}$

Find sum, occuring in ordered statistics pdf derivation

Partial sum of binomial coefficients n choose k multplied by k for k from n/2+1 to n

Given positive integers $n, k, i,$ prove $\binom{n}{k} = \sum_{j=i}^{n-k+i}\binom{j-i}{i-1}\binom{n-j}{k-i}$

Integral of product of 3D Gaussians

Is there a notation for summing a non-variable set of exponents

Is there a solution to this ? $f_0(n)=2n−1,\\ f_{k+1}(n)=\sum_{i=1}^nf_k(i)$

Entropy of partitioning for set of all $\binom{n}{k}$ combinations

Probability of different winner in two voting systems

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