I need help

07112018, 08:24 AM
Post: #1




I need help
Hey,
I'm using a casio 991 calculator for calculating derivatives but it always returns numeric values. Is there any way to get the derivative formula? https://ibb.co/fVFusT I was hoping to get a return value in that form. Can i do it with my Casio 991 or do I need to buy another calculator, if so, which do you recommend? Thanks! 

07112018, 01:59 PM
(This post was last modified: 07112018 02:02 PM by Maximilian Hohmann.)
Post: #2




RE: I need help
Hello!
I am not really familiar with Casio calculators, but to me it seems that your FX991 is a "normal" (although quite capable) scientific calculator. For symbolic calculations as you intend to perform a calculator with "CAS" capability (= Computer Algebra System) would be required. If you want to stay with Casio then the ClassPad II (FXCP400) would be the way to go. Otherwise the HP50g, HP Prime, Ti nSpire, Ti89, Ti Voyage 200 among some others might be candidates. Personally I like the Ti Voyage 200 a lot and they can be found second hand at bargain prices. Regards Max 

07112018, 05:59 PM
Post: #3




RE: I need help
a small correction: TI Nspire CX CAS


07112018, 07:51 PM
Post: #4




RE: I need help
I don't think you can get the derivative formula even with the last model of 991 (Classwiz)


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