oo ___ \ ` \ / n n 1\ ) |5 *x + -| / \ n/ /__, n = 1
Sum(5^n*x^n + 1/n, (n, 1, oo))
// 5*x \ || ------- for 5*|x| < 1| || 1 - 5*x | || | || oo | oo + |< ___ | || \ ` | || \ n n | || / 5 *x otherwise | || /__, | \\n = 1 /
oo + Piecewise((5*x/(1 - 5*x), 5*|x| < 1), (Sum(5^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