How can I evaluate $Re \sum_{n=0}^{N-1}e^{j\frac{xn}{N}}$?
5080
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?
49936
Various evaluations of the series $\sum_{n=0}^{\infty} \frac{(-1)^n}{(2n+1)^3}$
152698
Evaluation of $\sum_{n=0}^{\infty}\frac{1}{(n^4+n^2+1)n!}$
29524
Formula for the sum $\sum_{i=2}^{n} \frac1{i^2-1}$
68080
Evaluation of $\sum_{k=0}^n{n\choose k}^2u^k$
48200
Simplify $\sum_{i=0}^n (i+1)\binom ni$
84335
Solving for $\sum_{n = 1}^{\infty} \frac{n^3}{8^n}$?
65993
Does $\sum_{k=1}^\infty\frac1{k^n}$ converge for $\Re(n)=1,\Im(n)\ne0$?
84775
How to evaluate $\det (1+x_iy_j)_{n\times n}$?
32637
What is the sum of this series: $\displaystyle\sum_{n=0}^{\infty} \dfrac{a^n}{(3n)!}$
3341
Find $\sum_{r=1}^{3n-1}{ (-1)^{r-1}r\over{3n \choose r}}$, if $n$ is even
6416
How can I evaluate $\sum_{n=0}^\infty(n+1)x^n$?
55339
Find the sum $\sum_{n=1}^{\infty}\frac{ 1}{n^{2}(2n-1)}$
91784
Calculating $\sum_{n=1}^\infty {\frac{1}{2^nn(3n-1)}}$
30472
Evaluate $\sum_{k=0}^{n} {n \choose k}{m \choose k}$ for a given $n$ and $m$.
47572
Evaluate $ \sum_{n=1}^{\infty} \frac{\sin \ n}{ n } $ using the fourier series
17686
Evaluate the infinite series $\sum_{r=1}^{\infty} \frac{2^{-r}}{r^{2}}$