How do I find the equation of a derivative using a TI-84?

[gonzalohiguain]

I want to know how to do this so after I find the equation by hand, I can check to see if I am correct.

 

[Dr. Courtney]

I don't know about the TI-84, but Wolfram Alpha will do it and is easy to use.

www.wolframalpha.com

 

[Sir KiN]

Ti 84 does not do symbolic execution. I guess you can go to the plotter and input
Math->differentiate(f(a),a,0,x) as y1(x)
and what you think the derivative is as y2(x)
and see if they line up, or test certain values numerically.

But yah, the best option is to use a CAS, such as Mathematica/WolframAlpha or the TI 89