im stuck on another one:
it is sigma k=2 to infinity again, but the sum is 1/k^3-k
the reason i am stuck is the partial fracs give three parts then i dont know what to do
i solved it as -1/k + (1/2)/k+1 + (1/2)/k-1, i am lost because that doesnt really help me at all
This is the rules of this forum.
If you post new problems in the same thread, It will be too hard to follow the replies.
Anyway, as a student taking infinite series, you should be able to find the partial fraction expansion.
You do not know how to find A,B & C ?