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Thread: Confirm serie formula?

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  1. Mar 6th, 2004, 04:34 PM #1
    alkatran
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    Confirm serie formula?

    We just started geometric series ("suite" in french) in math. Anyways, I figured out a formula for calculating the sum of N elements and I came up with:

    T(n) = ab^n

    S(min, max) = a(b^(max+1)-b^min)/(b-1)
    min = first element to sum
    max = last element to sum
    S(2,3) = ab^2 + ab^3 for example

    Confirm?

    *edit* fixed a few math errors and put the right equation
    Last edited by alkatran; Mar 6th, 2004 at 05:13 PM.
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