HP 40G manual List functions, Alog, Exp, EXPM1, LNP1

ALOG	Antilogarithm (exponential). This is more accurate than
	10^x due to limitations of the power function.
	ALOG(value)
EXP	Natural exponential. This is more accurate than ex due to
	limitations of the power function.
	EXP(value)
EXPM1	Exponent minus 1 : ex–1. This is more accurate than EXP
	when x is close to zero.
	EXPM1(value)
LNP1	Natural log plus 1 : ln(x+1). This is more accurate than the
	natural logarithm function when x is close to zero.
	LNP1(value)

List functions

These functions work on list data. See “List functions” on page 13-7.

10-10 Using mathematical functions