This one is giving me problems.
The book tells me to calculate the n:th partialsum by dividing into two or more terms. Then to prove that the series converge and calculate its sum.
What is it that I am supposed to do really, donīt really get it.
Thanks for your help guys, it became a bit clearer for me.
I guess the 'trick' here is to write out some terms when
has been partial divided, and see what terms cancel out each other?
I can see that some terms cancel each other.
So I guess I`ll end up with:
Also thanks Krizalid for helping me with the convergence proof.
One question however, why did you write
Couldnīt we just make proof from scratch, without explicitly writing out the first term ?