Created
June 14, 2019 02:42
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| let lnPrec x eps = | |
| Seq.unfold (fun (s, n) -> | |
| if (s/(float n) < eps) then None | |
| else Some( (s, n), (s*(x-1.0)/x, n+1) )) ((x-1.0)/x, 1) | |
| |> Seq.fold (fun acc (s, n) -> acc + s/(float n)) 0.0 | |
| let lnRange x range = | |
| Seq.unfold (fun (s, n) -> | |
| if (n > range) then None | |
| else Some( (s, n), (s*(x-1.0)/x, n+1) )) ((x-1.0)/x, 1) | |
| |> Seq.fold (fun acc (s,n) -> acc + s/(float n)) 0.0 |
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