Math homework help - proofs

I don't even know where to start in this math proof that I need to do.

"Prove that for all n (positive integers) that the sum from i = 1 to n of (1/(i*(i+1))) = n/(n+1)

I don't even know where to start with this. Any suggestions?

I hv solved ur question & explained it in a pic... plz refer to d below link:

http://s1292.beta.photobucket.com/user/H…

Hope this will help.. :)

Use Sigma notation to write it as Σ¹|ⁿ 1/(i(i+1))
Basically, you are trying to prove that the sum from 1 to some number n is that nth term divided by the next term.
Eg: if n = 2: Find the first and second term, add them, and prove that they equal the second term divided by the third term.

Hope this helps.