https://math.stackexchange.com/questions/3224745/how-many-taylor-series-terms-are-needed-to-accurately-approximate-sqrtax-sHow many Taylor series terms are needed to accurately approximate √(a+x)−√(a)? #math #maths
x/(√(a+x)+√(a)) seems to be a worthwhile rewrite, haven't spotted a fatal flaw. considering |x|<<|a| in general, intending to use it for perturbation rendering of fractals in the future, perhaps
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