Find the sum

[Geetam]

1/(1x2) + 1/(2+3) + 1/(3+4) . . . . . . . . . .

[Guest]

1/(1x2) + 1/(2+3) + 1/(3+4) . . . . . . . . . .
or
1/(1+2) + 1/(2+3) + 1/(3+4) . . . . . . . . . .

[Guest]

In either case it diverges off to infinity.

If you meant [tex]\frac{1}{1\cdot 2}+\frac{1}{2\cdot 3}+\ldots+\frac{1}{n(n+1)}+\ldots[/tex]
see the problem of the week 2 months ago
http://www.math10.com/forum/viewtopic.php?f=42&t=868

Hope this helped,

R. Baber.