How does one plot or evaluate gamma(x + 1) for x < 0?

Jaime McCann shared this question 3 months ago
Answered

For all gamma(x + n) with constant n ≠ 1, GeoGebra correctly produces a function with a domain spanning the reals; any discontinuities are asymptotic. However, it seems gamma(x + 1) is simplified to x!, which, probably to account for its inductive definition, is undefined for x < 0.

Is there any way to input the function gamma(x + 1) as a function distinct from the more limited factorial?

Thanks in advance

Comments (3)

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Found a solution. The expression x*gamma(x) is equivalent to gamma(x + 1) and conveniently does not simplify to x!.

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 it seems gamma(x + 1) is simplified to x!

not for me

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Maybe it only happens in the Ubuntu package then.

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