Ti-83+ : (1/2)!

[Kalkewl8ter]

According to the TI-83+:

(-1/2)!=sqrt(pi)/2 and (1/2)!=sqrt(pi)

That is, if you observe the decimal values given by the TI-83+ for the expressions above, they will be equal. Any logical explanations?

[NotLKH]

The Factorial of a Number is related to the Gamma Function , and Mathworld has a good reference page about it:

http://mathworld.wolfram.com/GammaFunction.html

And, as you can see, in this extracted image, one form of the gamma function shows the simple relationship of when your number is 1/2:

[bugzpodder]

According to the TI-83+:

(-1/2)!=sqrt(pi)/2 and (1/2)!=sqrt(pi)

?? thats not what i got

[NotLKH]

From how I interpreted things at the wolfram site, I thought the values were reversed. So what did you come up with?

[Kalkewl8ter]

Oops! Yes, the values are reversed...sorry.