oo ____ \ ` \ n \ cos (x) ) ------- / n / 7 /___, n = 0
Sum(cos(x)^n/7^n, (n, 0, oo))
/ 1 |cos(x)| | ---------- for -------- < 1 | cos(x) 7 | 1 - ------ | 7 | < oo | ___ | \ ` | \ -n n | / 7 *cos (x) otherwise | /__, \n = 0
Piecewise((1/(1 - cos(x)/7), Abs(cos(x))/7 < 1), (Sum(7^(-n)*cos(x)^n, (n, 0, 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