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Xsub Ln Add1

Evaluation of the function x - ln(1 + x)
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Interface

C++
Excel

Xsub Ln Add1

 
doublexsub_ln_add1doublex )
Evaluations the function

Use when x is small, in the range 0.39 < x < 0.57, and expansion of this function yeilds a more accurate answer. For langer values of x, the solution is merely calculated in the usual way.

References:

DiDinato, A. R. and Morris, A. H. Algorithm 708: Significant Digit Computation of the Incomplete Beta Function Ratios. ACM Trans. Math. Softw. 18 (1993), 360-373.

Parameters

xthe value at which to evaluate the function

Authors

Will Bateman (August 2005)
Source Code

Source code is available when you agree to a GP Licence or buy a Commercial Licence.

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