Yes, as jo37 said, it is known, though they meant geometric series – the binomial formula would have binomial coefficients.

Note: The wikipedia formula is a more general form and written a different way. Divide out the "a" then note that (1-xⁿ)/(1-x) = (xⁿ-1)/(x-1). Then solve for xⁿ.

Good Day,
    Dean

In reply to Re: [OT] math fulguration by duelafn
in thread [OT] math fulguration by Discipulus

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