Hi guys, quick Question
For the series find a formula for
I know that every number will cancel out but and but the answer is .
How do we get ?
the partial sums are:
It's no longer infinite, just the first n terms.
So you can see that the 1/3 in the first term cancels the one in the third term, the 1/4 in the second term cancels the one in the fourth term, and so on. But when we get to 1/(n+1), there is no term to cancel it, and the same for 1/(n+2).
Hope this helps - feel free to post again in this thread if you're still having trouble.