Second Derivative

Press to access the second derivative option which algebraically finds the second derivative of an expression with respect to a variable at a value. If the value is omitted, the current value of the variable is used.

Next, enter an expression, the variable, and a value separated by commas. For example, to find the second derivative of y = x4 at x = 2, enter

4 2

For f(x) = x3, f"(2) = 48.

Note: Unfortunately, the TI cannot differentiate some functions algebraically. For these functions use the less accurate numerical differentiation option nDer twice.