Question

Solve the sum $\sum _{i=1}^4\:\sum _{j=1}^i\:\left(i\cdot \:j-1\right)$

score 832 · Answer 1 · 2019-01-14 04:26:15

832

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Solve the sum $\sum _{i=1}^4\:\sum _{j=1}^i\:\left(i\cdot \:j-1\right)$

Published on 14 Jan 2019 - 4:26

score 49 · Answer 2 · 2019-01-14 17:07:28

49

Views

Continous function $r(x)$ on $[0,1]$ such that $\lim_{n\rightarrow\infty}\sum_{k=0}^{n}\frac{1}{n}g(\frac{k}{n},a,b)r(\frac kn)=0$

Published on 14 Jan 2019 - 17:07

score 114 · Answer 3 · 2019-01-14 17:13:19

114

Views

Upper bound like $O(\log T)$ for the following sum of square root.

Published on 14 Jan 2019 - 17:13

score 68 · Answer 4 · 2026-04-01 14:03:03

68

Views

Naming a sum such as $\sum\limits_{x=1}^{n}{x}=\frac{n(n+1)}{2}$

Published on 01 Apr 2026 - 14:03

score 130 · Answer 5 · 2026-03-29 05:12:06

130

Views

Sum involving binomial coefficients and falling factorials

Published on 29 Mar 2026 - 5:12

score 68 · Answer 6 · 2019-01-15 09:32:04

68

Views

Summa equation to solve

Published on 15 Jan 2019 - 9:32

score 573 · Answer 7 · 2019-01-15 17:20:42

573

Views

Is there a way to evaluate analytically the following infinite double sum?

Published on 15 Jan 2019 - 17:20

score 111 · Answer 8 · 2026-04-01 03:19:21

111

Views

Limit of an alternating series

Published on 01 Apr 2026 - 3:19

score 63 · Answer 9 · 2019-01-15 18:44:04

63

Views

Approximate value for $\sum_{i=1}^n 2^{\lceil \log_2i\rceil}$.

Published on 15 Jan 2019 - 18:44

score 424 · Answer 10 · 2026-03-29 02:20:46

424

Views

Find the sum $S=\sum\limits_{k=1}^{n} {4k-1 \choose k}$

Published on 29 Mar 2026 - 2:20

score 78 · Answer 11 · 2019-01-16 09:18:43

78

Views

Reducing an algebraic summation expression

Published on 16 Jan 2019 - 9:18

score 203 · Answer 12 · 2019-01-16 13:42:15

203

Views

Why is sum of square root (given product) maximized with equal summands?

Published on 16 Jan 2019 - 13:42

score 44 · Answer 13 · 2026-03-25 03:19:44

44

Views

Evaluate $\sum_{y=0}^{2^n-1}e^{2\pi iy(z-x)/2^n}$

Published on 25 Mar 2026 - 3:19

score 49 · Answer 14 · 2019-01-16 16:39:28

49

Views

How to calculate this kind of summation?

Published on 16 Jan 2019 - 16:39

score 835 · Answer 15 · 2019-01-16 23:24:35

835

Views

Question on the limit of a sequence if the sum of the sequence converges

Published on 16 Jan 2019 - 23:24

List Question

Solve the sum $\sum _{i=1}^4\:\sum _{j=1}^i\:\left(i\cdot \:j-1\right)$

Continous function $r(x)$ on $[0,1]$ such that $\lim_{n\rightarrow\infty}\sum_{k=0}^{n}\frac{1}{n}g(\frac{k}{n},a,b)r(\frac kn)=0$

Upper bound like $O(\log T)$ for the following sum of square root.

Naming a sum such as $\sum\limits_{x=1}^{n}{x}=\frac{n(n+1)}{2}$

Sum involving binomial coefficients and falling factorials

Summa equation to solve

Is there a way to evaluate analytically the following infinite double sum?

Limit of an alternating series

Approximate value for $\sum_{i=1}^n 2^{\lceil \log_2i\rceil}$.

Find the sum $S=\sum\limits_{k=1}^{n} {4k-1 \choose k}$

Reducing an algebraic summation expression

Why is sum of square root (given product) maximized with equal summands?

Evaluate $\sum_{y=0}^{2^n-1}e^{2\pi iy(z-x)/2^n}$

How to calculate this kind of summation?

Question on the limit of a sequence if the sum of the sequence converges

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