NSpire

08312020, 12:39 AM
Post: #1




NSpire
Does one or both NSpire or NSpire CAS have the gamma function? If so, how do I find it?


08312020, 08:38 AM
Post: #2




RE: NSpire  
08312020, 03:39 PM
Post: #3




RE: NSpire
On my (ancient, compared to the NSpire) TI86 the factorial function takes fractional arguments  e.g., 2.7! If the NSpire does this you can find the gamma function, because gamma(x) = (x1)!. I don't know whether the NSpire factorial function works for complex numbers (the TI86 doesn't), but if you are interested in gamma(x) for real x this may help.
Nigel (UK) 

08312020, 03:49 PM
(This post was last modified: 08312020 03:50 PM by ijabbott.)
Post: #4




RE: NSpire
(08312020 03:39 PM)Nigel (UK) Wrote: On my (ancient, compared to the NSpire) TI86 the factorial function takes fractional arguments  e.g., 2.7! If the NSpire does this you can find the gamma function, because gamma(x) = (x1)!. I don't know whether the NSpire factorial function works for complex numbers (the TI86 doesn't), but if you are interested in gamma(x) for real x this may help. Unfortunately, the factorial operator only works on integers on the TINSpire, and it's the same on the TI89 series. BTW, the "factorial" function on real or complex domain is a.k.a. the "pi" function, that is: gamma(x) = pi(x1). — Ian Abbott 

08312020, 04:06 PM
Post: #5




RE: NSpire
(08312020 03:39 PM)Nigel (UK) Wrote: On my (ancient, compared to the NSpire) TI86 the factorial function takes fractional arguments  e.g., 2.7! No, that doesn’t work, that I checked right after I didn’t find the gamma function in the docs. Simple googlefu shows there are multiple ways how to add the function if needed though... 

09012020, 10:23 AM
Post: #6




RE: NSpire
(08312020 04:06 PM)vaklaff Wrote:(08312020 03:39 PM)Nigel (UK) Wrote: On my (ancient, compared to the NSpire) TI86 the factorial function takes fractional arguments  e.g., 2.7! 2.7! = 4.1706517838 on my TI 86 ... 

09012020, 07:40 PM
Post: #7




RE: NSpire
(09012020 10:23 AM)Pekis Wrote:(08312020 04:06 PM)vaklaff Wrote: No, that doesn’t work, that I checked right after I didn’t find the gamma function in the docs. Simple googlefu shows there are multiple ways how to add the function if needed though... That doesn’t work on Nspire. Sorry for not being clear... 

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