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Exponentiates a number and subtracts 1.

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Interface

#include <codecogs/maths/combinatorics/arithmetic/exp_sub1.h>

using namespace Maths::Combinatorics::Arithmetic;

double exp_sub1( double x )

Calculates the exponential of a number and subtracts 1:

$e^x -1$

(1)

Use when x <= 0.15

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

argument to evaluate the function at

Returns

$(e^x) -1$

(2)

This is the inverse of Ln_Add1

Interactive Calculator

Result –

Exp_Sub1

Interface

References

Parameters

Returns