- #1

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## Homework Statement

1/1(4) + 1/4(7) + 1/7(10)+....+ 1/(3n-2)(3n+1)

and the sigma notation is pretty obvious

## Homework Equations

nothing really..

## The Attempt at a Solution

I can see an obvious pattern its n(n+3) but n cannot be 2,3,5,6 etc.. and the second digit in the first term becomes the first digit in the next term. I think its fairly simply but I've just been staring at it blankly and i think ive passed that point where im doing any useful thinking so an answer or even a hint would be great.