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

express [3/7]+[4/8]+[5/9]+[6/10] in sigma notion.

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

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

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**Damon**, Sunday, December 19, 2010 at 1:42pm
Nope, 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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