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Description: Returns the natural logarithm of the gamma function, G(x).
Syntax: GAMMALN(x)
x is the value for which you want to calculate GAMMALN.
Remarks:
x must be a number.
x must be greater than 0.
The number e^GAMMALN(i), where i is an integer, returns the same result as (i - 1)!
GAMMALN is calculated as follows:
where:
Example:
GAMMALN(4) = 1.791759
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