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Have any mathematician created a formula to determine the approximate value of n!
Numbers are the essence of the Universe
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There are a few. The gamma function is used to extend n! to all real number instead of just integers. However, it isn't used much for approximations.
"In the real world, this would be a problem. But in mathematics, we can just define a place where this problem doesn't exist. So we'll go ahead and do that now..."
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Stirling's formula is one:
http://en.wikipedia.org/wiki/Stirling%27s_formula
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