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