Return to Open Page for TI89 Titanium
The differentiate command, 
To get the second derivative, enter d (3x^5,x,2). You can also take the derivative of a previous answer with d(ans(1),x) where you recall the answer. To get an antiderivative (without constant) enter d (3x^5,x,1). 
To evaluate a derivative at a specific value, use with. The with bar (  ) is located: TI89: its own key on the left 


The nDeriv command computes
numerical derivatives. You will not need to type the capital D
if you type in this command. 
Not as useful as the exact derivative. 
The formula used by
the calculator to generate nDeriv(f(x),x) is 