A Tiny (WP34S) program does a lot

11292014, 01:31 AM
Post: #8




RE: A Tiny (WP34S) program does a lot
(11282014 10:05 PM)Paul Dale Wrote: The derivative of the gamma function is the digamma function (ψ), well is trivial to get the derivative from this. This function was implemented both in C and in XROM but it was omitted from the final firmware. It remains a compile time option. On the HP 50g, which has digamma builtin, I remember I just solved 'Psi(X)=0.' for X: X = 1.46163214497 and GAMMA(X), or (X  1)!, = 0.885603194411 If only there were a closed form solution... 8*EulerGamma/(10 + 1/(2*(163 + √2))) Gerson. 

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