5 ____ \ ` \ 2*n \ n x / -1 *---- / 2*n! /___, n = 0
Sum((-1^n)*(x^(2*n)/((2*factorial(n)))), (n, 0, 5))
2 4 6 8 10 1 x x x x x - - - -- - -- - -- - -- - --- 2 2 4 12 48 240
-1/2 - x^2/2 - x^4/4 - x^6/12 - x^8/48 - x^10/240
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