On my TI-84 Plus graphics calc, I've found there's a function called nDeriv, that can be used to find a derivative. It sounds useful, so how do I use it?
So, for example, nDeriv(x^2+4x-3,x,2) will compute the derivative of at .
Others may want to add on to this. Also, why don't you look at the owner's manual for some more info?
I'm not sure where my manual is.
Why do you have to choose an x value? For example, the derivative of 2x = 2. How would you do that on a calculator?
It seems almost useless if you can only use it for a single point.
For example, the where I found out about it, I was reading the answer of a question. I had to sketch the derivative, and it said to use nDeriv in the calculator. But it seems it wouldn't help you sketch a graph, aside from delivering the derivative at certain points on the derivative function.