Question

Summing the even numbers in any row of pascal's triangle.

score 279 · Answer 1 · 2026-04-12 05:59:11

279

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Summing the even numbers in any row of pascal's triangle.

Published on 12 Apr 2026 - 5:59

score 343 · Answer 2 · 2026-04-15 22:03:51

343

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Prove $\sum_{i=0}^n \prod_{j=0,\ i\neq j}^n \frac{x-x_j}{x_i-x_j}=1$

Published on 15 Apr 2026 - 22:03

score 462 · Answer 3 · 2026-04-12 18:40:26

462

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The Heaviside functions in the following?

Published on 12 Apr 2026 - 18:40

score 498 · Answer 4 · 2026-04-15 19:58:38

498

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Triple Summation of product of Binomial Coefficients $\sum_{k=0}^n\sum_{j=0}^n\sum_{i=0}^n\binom ni\binom{n-i}j\binom{n-j}k=5^n$?

Published on 15 Apr 2026 - 19:58

score 196 · Answer 5 · 2026-04-15 09:32:05

196

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Testing a Series for Convergence or Divergence

Published on 15 Apr 2026 - 9:32

score 105 · Answer 6 · 2026-03-25 09:29:24

105

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Finding the Sum of series $S = \sum_{n=1}^{243} \frac{1}{n^{4/5}} $.

Published on 25 Mar 2026 - 9:29

score 295 · Answer 7 · 2026-04-14 10:35:17

295

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Double summation squared

Published on 14 Apr 2026 - 10:35

score 158 · Answer 8 · 2026-04-16 12:21:19

158

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Is there a closed form expression for $f(n) = \sum_{i=1}^n (-1)^{i+1}\frac{1}{i!}$

Published on 16 Apr 2026 - 12:21

score 141 · Answer 9 · 2026-03-27 02:37:31

141

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Stirling number identity related to balls and boxes

Published on 27 Mar 2026 - 2:37

score 719 · Answer 10 · 2026-03-25 12:41:38

719

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If $a,b,c$ are the sides of a triangle, then $\dfrac{a}{b+c-a}+\dfrac{b}{c+a-b}+\dfrac{c}{a+b-c}$ is:

Published on 25 Mar 2026 - 12:41

score 32 · Answer 11 · 2026-04-16 01:09:13

32

Views

Fibonacci numbers induction proof

Published on 16 Apr 2026 - 1:09

score 103 · Answer 12 · 2026-04-12 00:55:07

103

Views

Why does this limit make the sum converge?

Published on 12 Apr 2026 - 0:55

score 62 · Answer 13 · 2026-04-13 01:03:40

62

Views

Solution/approximation for $\sum_{z\in\mathbb{Z}} e^{-\frac{(zn+1)^2}{2}}$

Published on 13 Apr 2026 - 1:03

score 36 · Answer 14 · 2026-04-16 10:42:43

36

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Sum of $1/[(n + 1)^2] + 1/[(n + 2)^2] + ... + 1/[(2n)^2]$ when n goes to infinity

Published on 16 Apr 2026 - 10:42

score 73 · Answer 15 · 2026-04-15 16:38:05

73

Views

Is the probability of zero is not impossible according to this YouTube video link?

Published on 15 Apr 2026 - 16:38

List Question

Summing the even numbers in any row of pascal's triangle.

Prove $\sum_{i=0}^n \prod_{j=0,\ i\neq j}^n \frac{x-x_j}{x_i-x_j}=1$

The Heaviside functions in the following?

Triple Summation of product of Binomial Coefficients $\sum_{k=0}^n\sum_{j=0}^n\sum_{i=0}^n\binom ni\binom{n-i}j\binom{n-j}k=5^n$?

Testing a Series for Convergence or Divergence

Finding the Sum of series $S = \sum_{n=1}^{243} \frac{1}{n^{4/5}} $.

Double summation squared

Is there a closed form expression for $f(n) = \sum_{i=1}^n (-1)^{i+1}\frac{1}{i!}$

Stirling number identity related to balls and boxes

If $a,b,c$ are the sides of a triangle, then $\dfrac{a}{b+c-a}+\dfrac{b}{c+a-b}+\dfrac{c}{a+b-c}$ is:

Fibonacci numbers induction proof

Why does this limit make the sum converge?

Solution/approximation for $\sum_{z\in\mathbb{Z}} e^{-\frac{(zn+1)^2}{2}}$

Sum of $1/[(n + 1)^2] + 1/[(n + 2)^2] + ... + 1/[(2n)^2]$ when n goes to infinity

Is the probability of zero is not impossible according to this YouTube video link?

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