Expm1-func
Minimum Origin Version Required: 2019 SR0
This function returns exp(x)-1 accurately for the small values of x
double Expm1( double x)
x
Returns the value of exp(x)-1 when x is a small value.
expm1(0.00345)=; // ANS: expm1(0.00345)=0.0034559580998446
Exp, ln