oo ____ \ ` \ n \ x ) -- / n / 2 /___, n = 1
Sum(x^n/2^n, (n, 1, oo))
/ x |x| | --------- for --- < 1 | / x\ 2 | 2*|1 - -| | \ 2/ | < oo | ___ | \ ` | \ -n n | / 2 *x otherwise | /__, \n = 1
Piecewise((x/(2*(1 - x/2)), |x|/2 < 1), (Sum(2^(-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