Question

Closed for solution for $\sum_{k = 0}^{n} Q^{k} ( 1 - Q) ^ {k}$

score 48 · Answer 1 · 2026-04-14 09:41:19

48

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Closed for solution for $\sum_{k = 0}^{n} Q^{k} ( 1 - Q) ^ {k}$

Published on 14 Apr 2026 - 9:41

score 116 · Answer 2 · 2026-04-18 05:39:05

116

Views

GIF of the sum $\sum_{i=1}^{1000}\frac{1}{i^{2/3}}$

Published on 18 Apr 2026 - 5:39

score 41 · Answer 3 · 2026-04-28 19:03:50

41

Views

Find $\sigma$ for which $\sum _{i=1}^{n} \frac{1}{a_i\cdot a_{\sigma(i)}}$ is maximal

Published on 28 Apr 2026 - 19:03

score 34 · Answer 4 · 2026-04-12 23:12:09

34

Views

an infinite series that i couldn't figured out how to sum up

Published on 12 Apr 2026 - 23:12

score 43 · Answer 5 · 2026-04-15 15:13:48

43

Views

given the sum of a finite sequence of real numbers $x_i$'s, find the $\sum_{i=1}^{N} e^{x_i}$

Published on 15 Apr 2026 - 15:13

score 117 · Answer 6 · 2026-04-17 06:20:55

117

Views

Evaluate the sum $\sum_{n=0}^{\infty} \frac{2n}{8^n}{{2n}\choose{n}}$

Published on 17 Apr 2026 - 6:20

score 165 · Answer 7 · 2026-05-10 15:00:10

165

Views

Calculate $\sum_{ k = 1 } ^ n \ln ( 1 - x ^ k )$

Published on 10 May 2026 - 15:00

score 45 · Answer 8 · 2026-04-15 23:39:11

45

Views

Closed form of $\sum _{i=1}^n\:\frac{\left(m-i\right)!}{\left(n-i\right)!}$

Published on 15 Apr 2026 - 23:39

score 61 · Answer 9 · 2026-04-14 08:50:34

61

Views

When can you upper bound a summation by the Harmonic number?

Published on 14 Apr 2026 - 8:50

score 178 · Answer 10 · 2026-04-15 13:30:55

178

Views

Calculate $\sum_{n=1}^\infty\frac{n^x}{n!}$

Published on 15 Apr 2026 - 13:30

score 91 · Answer 11 · 2026-04-13 17:27:51

91

Views

Find zero of function $\sum_{n=0}^{\infty}\frac{cos(x(n+1))}{n!}$

Published on 13 Apr 2026 - 17:27

score 167 · Answer 12 · 2026-04-14 11:48:28

167

Views

Sum of product of NB combinations

Published on 14 Apr 2026 - 11:48

score 30 · Answer 13 · 2026-04-28 20:12:37

30

Views

possible number of sums

Published on 28 Apr 2026 - 20:12

score 120 · Answer 14 · 2026-04-22 15:54:31

120

Views

For any $n ≥ 5,$ the value of $1+ \frac{1}2 + \frac{1}3+···+\frac{1}{2^n −1}$ lies between

Published on 22 Apr 2026 - 15:54

score 71 · Answer 15 · 2026-03-27 20:25:53

71

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Evaluate $\lim_{n \to \infty} \sum_{j=0}^{n} \sum_{i=0}^j \frac{i^2+j^2}{n^4+ijn^2}$

Published on 27 Mar 2026 - 20:25

List Question

Closed for solution for $\sum_{k = 0}^{n} Q^{k} ( 1 - Q) ^ {k}$

GIF of the sum $\sum_{i=1}^{1000}\frac{1}{i^{2/3}}$

Find $\sigma$ for which $\sum _{i=1}^{n} \frac{1}{a_i\cdot a_{\sigma(i)}}$ is maximal

an infinite series that i couldn't figured out how to sum up

given the sum of a finite sequence of real numbers $x_i$'s, find the $\sum_{i=1}^{N} e^{x_i}$

Evaluate the sum $\sum_{n=0}^{\infty} \frac{2n}{8^n}{{2n}\choose{n}}$

Calculate $\sum_{ k = 1 } ^ n \ln ( 1 - x ^ k )$

Closed form of $\sum _{i=1}^n\:\frac{\left(m-i\right)!}{\left(n-i\right)!}$

When can you upper bound a summation by the Harmonic number?

Calculate $\sum_{n=1}^\infty\frac{n^x}{n!}$

Find zero of function $\sum_{n=0}^{\infty}\frac{cos(x(n+1))}{n!}$

Sum of product of NB combinations

possible number of sums

For any $n ≥ 5,$ the value of $1+ \frac{1}2 + \frac{1}3+···+\frac{1}{2^n −1}$ lies between

Evaluate $\lim_{n \to \infty} \sum_{j=0}^{n} \sum_{i=0}^j \frac{i^2+j^2}{n^4+ijn^2}$

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