20 Answered Questions

[SOLVED] How can I evaluate $\sum_{n=0}^\infty(n+1)x^n$?

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[SOLVED] Value of $\sum\limits_n x^n$

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[SOLVED] Sum of First $n$ Squares Equals $\frac{n(n+1)(2n+1)}{6}$

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[SOLVED] Find the sum of $\sum 1/(k^2 - a^2)$ when $0<a<1$

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[SOLVED] Convergence of $\sqrt{n}x_{n}$ where $x_{n+1} = \sin(x_{n})$

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[SOLVED] Series converges implies $\lim{n a_n} = 0$

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[SOLVED] "Closed" form for $\sum \frac{1}{n^n}$

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[SOLVED] Find the sum of the series $\sum \frac{1}{n(n+1)(n+2)}$

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