Question

How can I find The Big Oh bounds for a summation with multiple variables?

score 94 · Answer 1 · 2026-04-13 03:42:58

94

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How can I find The Big Oh bounds for a summation with multiple variables?

Published on 13 Apr 2026 - 3:42

score 219 · Answer 2 · 2026-04-13 17:27:07

219

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How to compute the following summation?

Published on 13 Apr 2026 - 17:27

score 103 · Answer 3 · 2026-04-13 10:53:16

103

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Rewriting nested summations that sometimes sum to zero

Published on 13 Apr 2026 - 10:53

score 936 · Answer 4 · 2026-03-25 12:53:11

936

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Challenge: How to prove this identity between bi- and trinomial coefficients?

Published on 25 Mar 2026 - 12:53

score 406 · Answer 5 · 2026-04-17 03:49:17

406

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Evaluating $\sum_{x=a}^b \left\lfloor {\frac{k}{x}} \right\rfloor$

Published on 17 Apr 2026 - 3:49

score 70 · Answer 6 · 2026-04-12 04:15:23

70

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Summation of series

Published on 12 Apr 2026 - 4:15

score 80 · Answer 7 · 2026-04-17 05:16:46

80

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Closed form sum for the series given below?

Published on 17 Apr 2026 - 5:16

score 69 · Answer 8 · 2026-04-10 13:26:27

69

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How can I compute the following fast?

Published on 10 Apr 2026 - 13:26

score 84 · Answer 9 · 2026-04-15 18:46:42

84

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Find $a_1$ given that $(1+x)^{100} = \sum_{i=0}^{100} a_ix^i$

Published on 15 Apr 2026 - 18:46

score 148 · Answer 10 · 2026-04-17 08:15:35

148

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find $\sum_{k=0}^{t}(-1)^k\binom{t}{k}^2$ for odd t then for even t

Published on 17 Apr 2026 - 8:15

score 466 · Answer 11 · 2026-04-15 09:19:35

466

Views

closed form for $\sum_{k=1}^n\left[ 2^k\binom{2n-k}{n-k}-2^{k+1}\binom{2n-k-1}{n-k-1}\right ]k^s$

Published on 15 Apr 2026 - 9:19

score 222 · Answer 12 · 2026-04-11 09:45:12

222

Views

summation of polynomial products

Published on 11 Apr 2026 - 9:45

score 2k · Answer 13 · 2026-04-15 05:03:16

2k

Views

What is $\lim_{n\to \infty}\sum_{k=1}^n \left(\frac{k}{n}\right)^n$?

Published on 15 Apr 2026 - 5:03

score 338 · Answer 14 · 2026-04-15 20:54:12

338

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Show that $ \sum_{k=0}^{r} \binom{r-k}{m} \binom{s+k}{n} = \binom{r+s+1}{m+n+1} $?

Published on 15 Apr 2026 - 20:54

score 6.1k · Answer 15 · 2026-04-14 01:06:45

6.1k

Views

Does the series $\sum \frac{1}{n\ (\ln(n))^{3/2}}$ converge or diverge?

Published on 14 Apr 2026 - 1:06

List Question

How can I find The Big Oh bounds for a summation with multiple variables?

How to compute the following summation?

Rewriting nested summations that sometimes sum to zero

Challenge: How to prove this identity between bi- and trinomial coefficients?

Evaluating $\sum_{x=a}^b \left\lfloor {\frac{k}{x}} \right\rfloor$

Summation of series

Closed form sum for the series given below?

How can I compute the following fast?

Find $a_1$ given that $(1+x)^{100} = \sum_{i=0}^{100} a_ix^i$

find $\sum_{k=0}^{t}(-1)^k\binom{t}{k}^2$ for odd t then for even t

closed form for $\sum_{k=1}^n\left[ 2^k\binom{2n-k}{n-k}-2^{k+1}\binom{2n-k-1}{n-k-1}\right ]k^s$

summation of polynomial products

What is $\lim_{n\to \infty}\sum_{k=1}^n \left(\frac{k}{n}\right)^n$?

Show that $ \sum_{k=0}^{r} \binom{r-k}{m} \binom{s+k}{n} = \binom{r+s+1}{m+n+1} $?

Does the series $\sum \frac{1}{n\ (\ln(n))^{3/2}}$ converge or diverge?

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