Well each term is going to have a .2, every term but the first will have a .02, every term but the 1st and 2nd will have a .002, etc.

So the basic idea in terms of in is like: Sum = .2*n+.02(n-1)+.002*(n-2)...

Make sense?

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- Oct 6th 2009, 12:46 AM #1

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- Oct 6th 2009, 01:44 AM #2

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