Can this be solved with any HP CAS?

[Gilles59]

(09-30-2017 07:16 PM)Csaba Tizedes Wrote:  

(09-30-2017 01:04 PM)Gilles59 Wrote:  but we have a brain. A cas is just a tool. This limitation of DOMAIN for the 50g is explain in the doc.

Yes, my biggest problem is that, the English is not my native and I cannot explain subtly what I want to say.Csaba

It's the same for me. There is a big difference between what I want to say and what i write in English ;D Your exemple is interesting about CAS limitations. I remember that my math teachers said so many time " hummm but what is the domain of definition of ....".