Question

Sequences and Series - neither an AP or a GP, how do I solve it

score 2.7k · Answer 1 · 2014-06-14 07:20:10

2.7k

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Sequences and Series - neither an AP or a GP, how do I solve it

Published on 14 Jun 2014 - 7:20

score 254 · Answer 2 · 2014-06-14 08:27:32

254

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How Find the sum $\sum_{n=2}^{\infty}\left(\sum_{j=1}^{n}\frac{1}{(2j-1)^2} \binom{2n}{n}\frac{1}{2^{2n}(2n+1)}\right)$

Published on 14 Jun 2014 - 8:27

score 211 · Answer 3 · 2026-04-09 12:24:47

211

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Refresh summation formulas

Published on 09 Apr 2026 - 12:24

score 233 · Answer 4 · 2026-04-11 14:17:11

233

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Weighted sum of $\cos(nx)$ series

Published on 11 Apr 2026 - 14:17

score 625 · Answer 5 · 2026-04-11 17:13:50

625

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Summation closed form.

Published on 11 Apr 2026 - 17:13

score 139 · Answer 6 · 2026-04-11 21:17:17

139

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Prove summation related to cycles: For $n \geq r $ there is:$ \sum_{k=1}^{n} {b_r(n,k)x^k=(r-1)!\frac{x^\overline{n}}{(x+1)^\overline{r-1}}} $

Published on 11 Apr 2026 - 21:17

score 180 · Answer 7 · 2026-04-10 22:37:56

180

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Discrete math: Sum of Geometric series on a problem - Notes make little sense.

Published on 10 Apr 2026 - 22:37

score 316 · Answer 8 · 2026-04-13 17:47:16

316

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Why is $\frac{\sum_{n=1}^{\infty} n}{\sum_{n=1}^{\infty} n}$ indeterminate?

Published on 13 Apr 2026 - 17:47

score 2k · Answer 9 · 2026-03-25 10:21:53

2k

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Derivative of Log of Summation of exponential function (base e)

Published on 25 Mar 2026 - 10:21

score 125 · Answer 10 · 2014-06-16 11:57:50

125

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Multiplying infinite sums

Published on 16 Jun 2014 - 11:57

score 48 · Answer 11 · 2026-04-09 14:36:50

48

Views

statements about summation

Published on 09 Apr 2026 - 14:36

score 102 · Answer 12 · 2026-04-09 23:55:23

102

Views

Convergence of sum using D'Alembert.

Published on 09 Apr 2026 - 23:55

score 66 · Answer 13 · 2026-03-28 20:09:38

66

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$\sum_{x=a}^{b-1}\frac{1}{x}$ and $\sum_{x=a+1}^b\frac{1}{x}$

Published on 28 Mar 2026 - 20:09

score 68 · Answer 14 · 2026-04-10 07:35:00

68

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Average sum of seria

Published on 10 Apr 2026 - 7:35

score 1k · Answer 15 · 2026-03-26 14:35:03

1k

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Proving that $\sum^n_{k=1} e^{ik\theta}=\sum^n_{i=1}\cos k\theta +i\sum^n_{k=1}\sin k\theta$.

Published on 26 Mar 2026 - 14:35

List Question

Sequences and Series - neither an AP or a GP, how do I solve it

How Find the sum $\sum_{n=2}^{\infty}\left(\sum_{j=1}^{n}\frac{1}{(2j-1)^2} \binom{2n}{n}\frac{1}{2^{2n}(2n+1)}\right)$

Refresh summation formulas

Weighted sum of $\cos(nx)$ series

Summation closed form.

Prove summation related to cycles: For $n \geq r $ there is:$ \sum_{k=1}^{n} {b_r(n,k)x^k=(r-1)!\frac{x^\overline{n}}{(x+1)^\overline{r-1}}} $

Discrete math: Sum of Geometric series on a problem - Notes make little sense.

Why is $\frac{\sum_{n=1}^{\infty} n}{\sum_{n=1}^{\infty} n}$ indeterminate?

Derivative of Log of Summation of exponential function (base e)

Multiplying infinite sums

statements about summation

Convergence of sum using D'Alembert.

$\sum_{x=a}^{b-1}\frac{1}{x}$ and $\sum_{x=a+1}^b\frac{1}{x}$

Average sum of seria

Proving that $\sum^n_{k=1} e^{ik\theta}=\sum^n_{i=1}\cos k\theta +i\sum^n_{k=1}\sin k\theta$.

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