Sum of powers for a non integer
2678
Values of $\sum_{n=0}^\infty x^n$ and $\sum_{n=0}^N x^n$
88973
How do you calculate this sum $\sum_{n=1}^\infty nx^n$?
128584
Sum of squared quadratic non-residues
26607
The idea behind the sum of powers of 2
37771
Sum of a power series $n x^n$
147920
Infinite powering by $i$
110416
Sums of roots of unity
78632
Summation equation for $2^{x-1}$
24301
Can a finite sum of square roots be an integer?
41002
sum of integers using order of integers and primitive roots
110975
Summation of reciprocals
48200
Simplify $\sum_{i=0}^n (i+1)\binom ni$
47792
Integer coefficient polynomial - values as powers of 2
8806
Summation of binomial coefficients
130548
What is the sum of the power series: $\sum_{k=2}^\infty\frac{x^k}{k(k-1)}$?
67332
Sum of two squares modulo p
83145
Sum of rational numbers