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Posted by **Geoff** on Sunday, December 19, 2010 at 1:27pm.

- maths -
**Damon**, Sunday, December 19, 2010 at 1:36pmsigma from x = 3 to x = 6 of [ x/(x+4) ]

- maths -
**Geoff**, Sunday, December 19, 2010 at 1:40pmhow did you find that equation ? it there a general formula for that ?

- maths -
**Damon**, Sunday, December 19, 2010 at 1:42pmNope, just look at it

on top

3,4,5, 6

=2, 3+1 etc

on bottom

7,8,9,10

= 7, 7+1 etc

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