exp2f man page on OpenDarwin

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```EXP(3)			 BSD Library Functions Manual			EXP(3)

NAME
exp, exp2, expm1 — exponential functions

SYNOPSIS
#include <math.h>

double
exp(double x);

float
expf(float x);

double
exp2(double x);

float
exp2f(float x);

double
expm1(double x);

float
expm1f(float x);

DESCRIPTION
The exp() function computes e**x, the base-e exponential of x.

The exp2() function computes 2**x, the base-2 exponential of x.

The expm1() function computes the base-e exponential of x , minus 1 accu‐
rately even for very small values of x.

SPECIAL VALUES
exp(�0) and exp2(�0) return 1.

exp(-infinity) and exp2(-infinity) return +0.

exp(+infinity) and exp2(+infinity) return +infinity.

expm1(�0) returns �0.

expm1(-infinity) returns -1.

expm1(+infinity) returns +infinity.

For all these functions, a range error occurs if the magnitude of x is
too large.

math(3), infnan(3)

STANDARDS
The exp() , expf() , exp2() , exp2f() , expm1() , and expm1f() functions
conform to ISO/IEC 9899:1999(E).

4th Berkeley Distribution      January 30, 2003	     4th Berkeley Distribution
```
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