Thank you very much. I bought one last week and I'm really happy with it. As you said it seems "future-proof" and the battery is really good and i found out that they do sell the spare batteries here in Iran!
This upgrade on the OS seems pretty useful too with capabilities like 'conics...
Hi.
I'm going to university in a month to study Electrical Engineering.I already have an TI83 + , but I'm thinking of upgrading to a TI 89 or TI Nspire CAS CX because they both have CAS.
Now from what I've read on the Internet the Nspire CAS seems better because of the higher resolution color...