Proof of Arithemetic Progression

1. Nov 11, 2004

Can someone help me in how I would go about in proving that the nth term of a arithemetic progression of order k is can be represented by the following (see jpeg file). How would I use the fact of the expansion of (n+1) and s(n+1) - s(n)?

Thanks!

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• f90.jpg
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2. Nov 11, 2004