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