Sum function for power series
92665
Find a function for the infinite sum $\sum_{n=0}^\infty \frac{n}{n+1}x^n$
140221
Product of two power series
95739
Sum of tangent functions where arguments are in specific arithmetic series
67731
Calculate the sum of infinite series with general term $\frac{n^2}{2^n}$.
70677
Finite Sum of Power?
15403
Sum of square of function
140462
Find a closed form for the power series $f_p(x)=\sum\limits_{n=0}^\infty\frac{n^p}{n!}x^n$
1379
Summation of $n^2x^n$ terms
88973
How do you calculate this sum $\sum_{n=1}^\infty nx^n$?
123951
Problem calculating sum of convergent series of $\sum_{n=2}^{\infty} \frac{1}{n^{2}-1}$
134633
How to sum this series for $\pi/2$ directly?
128540
Formal power series coefficient multiplication
130548
What is the sum of the power series: $\sum_{k=2}^\infty\frac{x^k}{k(k-1)}$?
148143
Find the sum to n terms as well as the sum to infinity of the series:
113713
Closed formula for the sum of the following series
30895
Compute the sum of the series $\sum_{n=1}^{\infty} \frac{1}{n \cdot 2^n}$
76311
$f'' + f =0$: finding $f$ using power series