pi ___ \ ` \ / cos(3*x) cos(5*x)\ ) |cos(x) + -------- + --------| / \ 9 25 / /__, n = 1
Sum(cos(x) + cos(3*x)/9 + cos(5*x)/25, (n, 1, pi))
/cos(3*x) cos(5*x) \ pi*|-------- + -------- + cos(x)| \ 9 25 /
pi*(cos(3*x)/9 + cos(5*x)/25 + cos(x))
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