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10292011  #1 
Join Date: May 2011
Posts: 86

Urgent, Help
Alright, I have homework I need finished by tommorrow. Here is a problem or two.
7. Expressed in terms of n what is the sum of all the terms in the arithmetic sequence (n7), (n2), . . . . (n+428)? 8. If x = a/b, find (a+b)/(ab) in terms of x.
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