- #1
neom
- 13
- 0
How can I show that [tex]\sum_{i=1}^n\;\frac1{i(i+1)}=\frac{n}{n+1}[/tex]
I've already figured out i can write it as [tex]\sum_{i=1}^n\;\frac1{i}-\sum_{i=1}^n\;\frac1{i+1}[/tex]
but as I'm a little drunk I can't figure out how to get from there to the formula.
Sorry if I put this in the wrong sextion, but twas in my calculus book.
I've already figured out i can write it as [tex]\sum_{i=1}^n\;\frac1{i}-\sum_{i=1}^n\;\frac1{i+1}[/tex]
but as I'm a little drunk I can't figure out how to get from there to the formula.
Sorry if I put this in the wrong sextion, but twas in my calculus book.