sexpm1 - Exponentiation ex-1

21.2 sexpm1 - Exponentiation $ex -1$

#include <msca.h> 
 
double sexpm1 (double x); 
float  sexpm1f(float x);

Given a value $x$ this function raises $e$ to $x$ and subtracts one, that is $ex-1$ . This function is more precise than using the equivalent operations.

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