oo ___ \ ` \ / __________________ \ ) | / 2 | / \\/ 9*x + 3*(x + 1) - 3*x/ /__, n = 1
Sum(sqrt(9*x^2 + 3*(x + 1)) - 3*x, (n, 1, oo))
/ ________________ \ | / 2 | oo*\\/ 3 + 3*x + 9*x - 3*x/
oo*(sqrt(3 + 3*x + 9*x^2) - 3*x)
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