Calculating derivatives TI-nSpire CX CAS

Simple:
Calculating derivatives TI-nSpire CX CAS

[justiniansu]

When I enter the same thing, my calculator tells me that “Variable is not defined”. How should I fix it?

[ScreenedInstructor]

To play videos to the highest quality (mostly 1080p few 720p )... select the gear icon and manually select the highest quality (for PC). For mobile select menu options and manually select from there.