oo ____ \ ` \ n \ -- / n / x /___, n = 1
Sum(n/x^n, (n, 1, oo))
/ 1 1 |---------- for --- < 1 | 2 |x| | / 1\ |x*|1 - -| | \ x/ | < oo | ___ | \ ` | \ -n | / n*x otherwise | /__, |n = 1 \
Piecewise((1/(x*(1 - 1/x)^2), 1/|x| < 1), (Sum(n*x^(-n), (n, 1, oo)), True))
x^n/n
(x-1)^n
1/2^(n!)
n^2/n!
x^n/n!
k!/(n!*(n+k)!)
csc(n)^2/n^3
1/n^2
1/n^4
1/n^6
1/n
(-1)^n
(-1)^(n + 1)/n
(n + 2)*(-1)^(n - 1)
(3*n - 1)/(-5)^n
(-1)^(n - 1)*n/(6*n - 5)
(-1)^(n + 1)/n*x^n
(3*n - 1)/(-5)^n