log1p

Calculates the natural logarithm of 1 + x.

For very small x, log1p(x) will be more accurate than log(1 + x).

Special Values
x	log1p(x)	divide by 0?	invalid?
±0.0	±0.0	no	no
-1.0	-∞	yes	no
<-1.0	-NaN	no	yes
+∞	+∞	no	no

real log1p(real x)
double log1p(double x)
pragma(inline, true) @safe pure nothrow @nogc
double
log1p
(
double x
)
float log1p(float x)

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