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TI-Nspire CX CAS Graphing Calc

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Specification :

Full-color screen with backlit display.
All the functionality of the TI-Nspire CX handheld plus a built-in Computer Algebra System (CAS).
Touchpad navigation works more like a laptop computer.
Ability to utilize images and overlay with graphical elements on screen
Powered by a TI-Nspire Rechargeable Battery (Included)
View multiple representations of a single problem on screen, at the same time.
Make changes to one representation of a problem and instantly see how it affects other "dynamically linked" representations
Built-in interactive geometry capabilities
Navigate easily between screens and functions using the intuitive, computer-style interface.
Enter text easily using individual (alpha) letter keys.
Create and save problem-solving steps as electronic TI-Nspire documents similar to those on a computer.
Link directly to another TI-Nspire or TI-Nspire CAS handheld or a computer to easily transfer TI-Nspire documents back-and-forth.
Available memory: 16MB RAM / 20MB ROM