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log1p - logarithm of 1 plus argument
#include <math.h>
double log1p(double x);
float log1pf(float x);
long double log1pl(long double x);
log1p(x) returns a value equivalent to ‘log (1 + x)’. It is computed
in a way that is accurate even if the value of x is near zero.
BSD, C99. The float and the long double variants are C99 requirements.
exp(3)
, log(3)
, expm1(3)
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