List questions from summation

Published on 15 Apr 2026 - 16:09

108

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General formula for Evaluating $\sum_{n=0}^\infty n^ar^n$ where $ |r|<1 , a\ge0$

Published on 12 Apr 2026 - 9:00

261

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Determine the value of summation form.

Published on 12 Apr 2026 - 6:33

301

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Is it possible to create a system of differential equations that ALWAYS sum to 1?

Published on 11 Apr 2026 - 15:31

175

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Algebraically prove that $\sum\limits_{k=0}^n {n+k \choose n}\mathrm{2}^{n-k} = 1/2 \cdot \mathrm{2}^{2n+1}$

Published on 10 May 2026 - 19:54

310

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Evaluate a sum which almost looks telescoping but not quite:$\sum_{k=2}^n \frac{1}{k(k+2)}$

Published on 05 May 2026 - 16:23

286

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Compute the values of the Double Sum

Published on 05 May 2026 - 19:05

252

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partial sum of the series involving trigonometric function

Published on 10 May 2026 - 22:05

268

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Rewriting the Index of Summation

Published on 15 Apr 2026 - 10:43

86

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How to find the finite or infinite sum of a given series?

Published on 13 Apr 2026 - 12:44

280

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How to calculate the value of $\sum\limits_{k=0}^{\infty}\frac{1}{(3k+1)\cdot(3k+2)\cdot(3k+3)}$?

Published on 10 May 2026 - 20:44

8.9k

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Partial Sums of Geometric Series

Published on 11 Apr 2026 - 3:35

61

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The proof of $\frac{\partial g_j}{\partial x_i} g_i = \frac{\partial}{\partial x_i} \Big(\frac{1}{2} |\vec{g}|^2 \delta_{ij} \Big) $.

Published on 10 May 2026 - 13:51

391

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Evaluate $\sum_{k=1}^n\frac{1}{k}\binom{n}{k}$

Published on 10 May 2026 - 14:56

141

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Infinite Sum with Combinatoric Expression

Published on 09 Apr 2026 - 22:00

List Question

Simplifying $\sum_{ m = - \infty}^{\infty} e^{-am^2/2 + bm}$

General formula for Evaluating $\sum_{n=0}^\infty n^ar^n$ where $ |r|<1 , a\ge0$

Determine the value of summation form.

Is it possible to create a system of differential equations that ALWAYS sum to 1?

Algebraically prove that $\sum\limits_{k=0}^n {n+k \choose n}\mathrm{2}^{n-k} = 1/2 \cdot \mathrm{2}^{2n+1}$

Evaluate a sum which almost looks telescoping but not quite:$\sum_{k=2}^n \frac{1}{k(k+2)}$

Compute the values of the Double Sum

partial sum of the series involving trigonometric function

Rewriting the Index of Summation

How to find the finite or infinite sum of a given series?

How to calculate the value of $\sum\limits_{k=0}^{\infty}\frac{1}{(3k+1)\cdot(3k+2)\cdot(3k+3)}$?

Partial Sums of Geometric Series

The proof of $\frac{\partial g_j}{\partial x_i} g_i = \frac{\partial}{\partial x_i} \Big(\frac{1}{2} |\vec{g}|^2 \delta_{ij} \Big) $.

Evaluate $\sum_{k=1}^n\frac{1}{k}\binom{n}{k}$

Infinite Sum with Combinatoric Expression

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