expm1(3p): Mathematical error in given example

xenoantares@xxxxxxx · Thu, 11 Feb 2021 10:59:18 +0100

  Hi there!

In the APPLICATION USAGE section of expm1(3p)[1] the given example is wrong:

===8<=== Snip =========================================

[..] calculations of ((1+x)n-1)/x, namely:

           expm1(n * log1p(x))/x

======== Snap ====================================>8===

Actually, both expressions are not equal, rather

 expm1(n * log1p(x))/x = ((1+x)**n - 1)/x

(with a fictional ** as power infix-operator) would be.

  Best regards
          -- XA

____
[1] As of version to be found at
    https://man7.org/linux/man-pages/man3/expm1.3p.html
--
XenoAntares