Hi, I found a question on the front page of the website of my examination board:

MEI - Mathematics in Education and Industry

The 'Maths Item of the Month' is the one you should be looking at.

How do you do this? I think that the answer is found by considering...

$\displaystyle

\sum \frac{1}{n(n+1)}

$

But I don't know how to do this sum to infinity, much appreciated...

KHAN