oo ____ \ ` \ / / 5*n \\ \ (4*n - 1)*|1 - cos|------|| / | | 2 || / \ \n + 4// /___, n = 1
Sum((4*n - 1)*(1 - cos((5*n)/(n^2 + 4))), (n, 1, oo))
oo ____ \ ` \ / / 5*n \\ \ |1 - cos|------||*(-1 + 4*n) / | | 2|| / \ \4 + n // /___, n = 1
Sum((1 - cos(5*n/(4 + n^2)))*(-1 + 4*n), (n, 1, oo))
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